diff --git a/.idea/codeStyles/Project.xml b/.idea/codeStyles/Project.xml
new file mode 100644
index 0000000..b3295c5
--- /dev/null
+++ b/.idea/codeStyles/Project.xml
@@ -0,0 +1,7 @@
+<component name="ProjectCodeStyleConfiguration">
+  <code_scheme name="Project" version="173">
+    <XML>
+      <option name="XML_LEGACY_SETTINGS_IMPORTED" value="true" />
+    </XML>
+  </code_scheme>
+</component>
\ No newline at end of file
diff --git a/.idea/codeStyles/codeStyleConfig.xml b/.idea/codeStyles/codeStyleConfig.xml
new file mode 100644
index 0000000..a55e7a1
--- /dev/null
+++ b/.idea/codeStyles/codeStyleConfig.xml
@@ -0,0 +1,5 @@
+<component name="ProjectCodeStyleConfiguration">
+  <state>
+    <option name="PREFERRED_PROJECT_CODE_STYLE" value="Default" />
+  </state>
+</component>
\ No newline at end of file
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 5d86774..115b840 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -7,7 +7,21 @@
   </component>
   <component name="ChangeListManager">
     <list default="true" id="8a88262f-88f4-4f1f-8fed-10700b7b5117" name="Default" comment="">
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/.idea/workspace.xml" afterPath="$PROJECT_DIR$/.idea/workspace.xml" />
+      <change beforePath="" afterPath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodBoolIsTrue.java" />
+      <change beforePath="" afterPath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodBoolNot.java" />
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" afterPath="$PROJECT_DIR$/.idea/workspace.xml" />
+      <change beforePath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/AppInfo.java" afterPath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/AppInfo.java" />
+      <change beforePath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/ObjectBag.java" afterPath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/ObjectBag.java" />
+      <change beforePath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/Parser.java" afterPath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/Parser.java" />
+      <change beforePath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/Reserved.java" afterPath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/Reserved.java" />
+      <change beforePath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/Runtime.java" afterPath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/Runtime.java" />
+      <change beforePath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/Method.java" afterPath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/Method.java" />
+      <change beforePath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/InterpretedMethod.java" afterPath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/InterpretedMethod.java" />
+      <change beforePath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/NativeMethod.java" afterPath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/NativeMethod.java" />
+      <change beforePath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodCopy.java" afterPath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodCopy.java" />
+      <change beforePath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodIntAbs.java" afterPath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodIntAbs.java" />
+      <change beforePath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/objs/ObjectParent.java" afterPath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/objs/ObjectParent.java" />
+      <change beforePath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/ui/VisualEngine.java" afterPath="$PROJECT_DIR$/src/com/devbaltasarq/pooi/ui/VisualEngine.java" />
     </list>
     <ignored path="pooi.iws" />
     <ignored path=".idea/workspace.xml" />
@@ -20,7 +34,6 @@
     <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
     <option name="LAST_RESOLUTION" value="IGNORE" />
   </component>
-  <component name="ChangesViewManager" flattened_view="true" show_ignored="false" />
   <component name="CoverageDataManager">
     <SUITE FILE_PATH="coverage/pooi$Gui.coverage" NAME="Gui Coverage Results" MODIFIED="1464605001294" SOURCE_PROVIDER="com.intellij.coverage.DefaultCoverageFileProvider" RUNNER="idea" COVERAGE_BY_TEST_ENABLED="false" COVERAGE_TRACING_ENABLED="false" />
   </component>
@@ -68,35 +81,11 @@
     <line_breakpoints default_suspend_policy="SuspendAll" default_condition_enabled="true" converted="true" />
     <breakpoint_rules converted="true" />
   </component>
-  <component name="ExecutionTargetManager" SELECTED_TARGET="default_target" />
   <component name="FavoritesManager">
     <favorites_list name="pooi" />
   </component>
   <component name="FileEditorManager">
-    <leaf SIDE_TABS_SIZE_LIMIT_KEY="300">
-      <file leaf-file-name="VisualEngine.java" pinned="false" current-in-tab="true">
-        <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/ui/VisualEngine.java">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="1156">
-              <caret line="716" column="33" selection-start-line="716" selection-start-column="33" selection-end-line="716" selection-end-column="33" />
-              <folding />
-            </state>
-          </provider>
-        </entry>
-      </file>
-      <file leaf-file-name="Runtime.java" pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/Runtime.java">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="1955">
-              <caret line="126" column="77" selection-start-line="126" selection-start-column="77" selection-end-line="126" selection-end-column="77" />
-              <folding>
-                <element signature="imports" expanded="true" />
-              </folding>
-            </state>
-          </provider>
-        </entry>
-      </file>
-    </leaf>
+    <leaf SIDE_TABS_SIZE_LIMIT_KEY="300" />
   </component>
   <component name="FileTemplateManagerImpl">
     <option name="RECENT_TEMPLATES">
@@ -105,6 +94,11 @@
       </list>
     </option>
   </component>
+  <component name="FindInProjectRecents">
+    <findStrings>
+      <find>Id</find>
+    </findStrings>
+  </component>
   <component name="FindManager">
     <FindUsagesManager>
       <setting name="OPEN_NEW_TAB" value="false" />
@@ -121,13 +115,6 @@
   <component name="IdeDocumentHistory">
     <option name="CHANGED_PATHS">
       <list>
-        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/Attribute.java" />
-        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodIntMultiplyByAssign.java" />
-        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodRealMultiplyByAssign.java" />
-        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodRealMultiplyBy.java" />
-        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodIntDivideByAssign.java" />
-        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodIntDivideBy.java" />
-        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodRealDivideBy.java" />
         <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/Lexer.java" />
         <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodIntIsEqualTo.java" />
         <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodIntIsGreaterThan.java" />
@@ -157,21 +144,28 @@
         <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/objs/ObjectInt.java" />
         <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/ui/App.java" />
         <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodStr.java" />
-        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/Method.java" />
         <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/ui/ObjectBox.java" />
-        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/Reserved.java" />
-        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/ObjectBag.java" />
         <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodEmbed.java" />
-        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/objs/ObjectParent.java" />
         <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/res/scripts/math.poi" />
-        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/AppInfo.java" />
         <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/Interpreter.java" />
         <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeIntReal.java" />
         <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodRealInt.java" />
         <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodIntReal.java" />
-        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/Runtime.java" />
         <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodRealRound.java" />
         <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/ui/VisualEngine.java" />
+        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodCopy.java" />
+        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodIntAbs.java" />
+        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/Runtime.java" />
+        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodBoolNot.java" />
+        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodBoolIsTrue.java" />
+        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/AppInfo.java" />
+        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/Method.java" />
+        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/NativeMethod.java" />
+        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/InterpretedMethod.java" />
+        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/Parser.java" />
+        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/Reserved.java" />
+        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/ObjectBag.java" />
+        <option value="$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/objs/ObjectParent.java" />
       </list>
     </option>
   </component>
@@ -192,20 +186,12 @@
     <treeState />
   </component>
   <component name="ProjectFrameBounds">
-    <option name="x" value="54" />
-    <option name="y" value="-8" />
-    <option name="width" value="1320" />
-    <option name="height" value="772" />
+    <option name="x" value="-4" />
+    <option name="width" value="1573" />
+    <option name="height" value="1050" />
   </component>
   <component name="ProjectLevelVcsManager" settingsEditedManually="true">
-    <OptionsSetting value="true" id="Add" />
-    <OptionsSetting value="true" id="Remove" />
-    <OptionsSetting value="true" id="Checkout" />
-    <OptionsSetting value="true" id="Update" />
-    <OptionsSetting value="true" id="Status" />
-    <OptionsSetting value="true" id="Edit" />
     <ConfirmationsSetting value="2" id="Add" />
-    <ConfirmationsSetting value="0" id="Remove" />
   </component>
   <component name="ProjectReloadState">
     <option name="STATE" value="0" />
@@ -225,161 +211,38 @@
       <foldersAlwaysOnTop value="true" />
     </navigator>
     <panes>
-      <pane id="Scratches" />
-      <pane id="Scope">
-        <subPane subId="Project Files">
-          <PATH>
-            <PATH_ELEMENT USER_OBJECT="Root">
-              <option name="myItemId" value="" />
-              <option name="myItemType" value="" />
-            </PATH_ELEMENT>
-          </PATH>
-        </subPane>
-      </pane>
+      <pane id="Scope" />
       <pane id="ProjectPane">
         <subPane>
-          <PATH>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="pooi" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="External Libraries" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ExternalLibrariesNode" />
-            </PATH_ELEMENT>
-          </PATH>
-          <PATH>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="pooi" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="Pooi" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-          </PATH>
-          <PATH>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="pooi" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="Pooi" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="src" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-          </PATH>
-          <PATH>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="pooi" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="Pooi" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="src" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="pooi" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="ui" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-          </PATH>
-          <PATH>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="pooi" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="Pooi" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="src" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="pooi" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="res" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="scripts" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-          </PATH>
-          <PATH>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="pooi" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="Pooi" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="src" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="pooi" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="res" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-          </PATH>
-          <PATH>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="pooi" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="Pooi" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="src" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="pooi" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="core" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PsiDirectoryNode" />
-            </PATH_ELEMENT>
-          </PATH>
-        </subPane>
-      </pane>
-      <pane id="PackagesPane">
-        <subPane>
-          <PATH>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="pooi" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PackageViewProjectNode" />
-            </PATH_ELEMENT>
-            <PATH_ELEMENT>
-              <option name="myItemId" value="Pooi" />
-              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.PackageViewModuleNode" />
-            </PATH_ELEMENT>
-          </PATH>
+          <expand>
+            <path>
+              <item name="pooi" type="b2602c69:ProjectViewProjectNode" />
+              <item name="Pooi" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="pooi" type="b2602c69:ProjectViewProjectNode" />
+              <item name="Pooi" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="pooi" type="b2602c69:ProjectViewProjectNode" />
+              <item name="Pooi" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="pooi" type="462c0819:PsiDirectoryNode" />
+            </path>
+            <path>
+              <item name="pooi" type="b2602c69:ProjectViewProjectNode" />
+              <item name="Pooi" type="462c0819:PsiDirectoryNode" />
+              <item name="src" type="462c0819:PsiDirectoryNode" />
+              <item name="pooi" type="462c0819:PsiDirectoryNode" />
+              <item name="core" type="462c0819:PsiDirectoryNode" />
+            </path>
+          </expand>
+          <select />
         </subPane>
       </pane>
+      <pane id="Scratches" />
+      <pane id="PackagesPane" />
     </panes>
   </component>
   <component name="PropertiesComponent">
@@ -389,7 +252,7 @@
     <property name="options.splitter.main.proportions" value="0.3" />
     <property name="recentsLimit" value="5" />
     <property name="MemberChooser.sorted" value="false" />
-    <property name="last_opened_file_path" value="$PROJECT_DIR$/lib/jgraphx.jar!/" />
+    <property name="last_opened_file_path" value="$PROJECT_DIR$" />
     <property name="GenerateAntBuildDialog.outputFileNameProperty" value="pooi" />
     <property name="GenerateAntBuildDialog.enableUiFormCompile" value="true" />
     <property name="GoToClass.toSaveIncludeLibraries" value="false" />
@@ -409,7 +272,7 @@
     <property name="aspect.path.notification.shown" value="true" />
     <property name="WebServerToolWindowFactoryState" value="false" />
     <property name="js-jscs-nodeInterpreter" value="/usr/local/bin/node" />
-    <property name="settings.editor.selected.configurable" value="configurable.group.language" />
+    <property name="settings.editor.selected.configurable" value="preferences.sourceCode.Java" />
     <property name="settings.editor.splitter.proportion" value="0.2" />
   </component>
   <component name="RecentsManager">
@@ -436,8 +299,28 @@
       <recent name="core.objs" />
     </key>
   </component>
+  <component name="RunDashboard">
+    <option name="ruleStates">
+      <list>
+        <RuleState>
+          <option name="name" value="ConfigurationTypeDashboardGroupingRule" />
+        </RuleState>
+        <RuleState>
+          <option name="name" value="StatusDashboardGroupingRule" />
+        </RuleState>
+      </list>
+    </option>
+  </component>
   <component name="RunManager" selected="Application.Gui">
-    <configuration default="false" name="Gui" type="Application" factoryName="Application" temporary="true">
+    <configuration default="true" type="Applet" factoryName="Applet">
+      <module />
+      <option name="HTML_USED" value="false" />
+      <option name="WIDTH" value="400" />
+      <option name="HEIGHT" value="300" />
+      <option name="POLICY_FILE" value="$APPLICATION_HOME_DIR$/bin/appletviewer.policy" />
+      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
+    </configuration>
+    <configuration name="Gui" type="Application" factoryName="Application" temporary="true">
       <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
       <option name="MAIN_CLASS_NAME" value="com.devbaltasarq.pooi.ui.App" />
       <option name="VM_PARAMETERS" value="" />
@@ -458,13 +341,98 @@
       <RunnerSettings RunnerId="Run" />
       <ConfigurationWrapper RunnerId="Debug" />
       <ConfigurationWrapper RunnerId="Run" />
-      <method />
+    </configuration>
+    <configuration default="true" type="Application" factoryName="Application">
+      <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
+      <option name="MAIN_CLASS_NAME" value="UI.Gui" />
+      <option name="VM_PARAMETERS" value="" />
+      <option name="PROGRAM_PARAMETERS" value="" />
+      <option name="WORKING_DIRECTORY" value="file://$MODULE_DIR$" />
+      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
+      <option name="ALTERNATIVE_JRE_PATH" value="" />
+      <option name="ENABLE_SWING_INSPECTOR" value="false" />
+      <option name="ENV_VARIABLES" />
+      <option name="PASS_PARENT_ENVS" value="true" />
+      <module name="" />
+      <envs />
+      <method>
+        <option name="BuildArtifacts" enabled="true" />
+        <option name="Make" enabled="true" />
+      </method>
+    </configuration>
+    <configuration name="nogui" type="Application" factoryName="Application">
+      <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
+      <option name="MAIN_CLASS_NAME" value="com.devbaltasarq.pooi.ui.App" />
+      <option name="VM_PARAMETERS" value="" />
+      <option name="PROGRAM_PARAMETERS" value="--nogui samples/init.txt" />
+      <option name="WORKING_DIRECTORY" value="file://$MODULE_DIR$" />
+      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
+      <option name="ALTERNATIVE_JRE_PATH" />
+      <option name="ENABLE_SWING_INSPECTOR" value="false" />
+      <option name="ENV_VARIABLES" />
+      <option name="PASS_PARENT_ENVS" value="true" />
+      <module name="Pooi" />
+      <envs />
+    </configuration>
+    <configuration default="true" type="JUnit" factoryName="JUnit">
+      <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
+      <module name="" />
+      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
+      <option name="ALTERNATIVE_JRE_PATH" />
+      <option name="PACKAGE_NAME" />
+      <option name="MAIN_CLASS_NAME" />
+      <option name="METHOD_NAME" />
+      <option name="TEST_OBJECT" value="class" />
+      <option name="VM_PARAMETERS" value="-ea" />
+      <option name="PARAMETERS" />
+      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$" />
+      <option name="ENV_VARIABLES" />
+      <option name="PASS_PARENT_ENVS" value="true" />
+      <option name="TEST_SEARCH_SCOPE">
+        <value defaultName="moduleWithDependencies" />
+      </option>
+      <envs />
+      <patterns />
+    </configuration>
+    <configuration default="true" type="Remote" factoryName="Remote">
+      <option name="USE_SOCKET_TRANSPORT" value="true" />
+      <option name="SERVER_MODE" value="false" />
+      <option name="SHMEM_ADDRESS" value="javadebug" />
+      <option name="HOST" value="localhost" />
+      <option name="PORT" value="5005" />
+    </configuration>
+    <configuration default="true" type="TestNG" factoryName="TestNG">
+      <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
+      <module name="" />
+      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
+      <option name="ALTERNATIVE_JRE_PATH" />
+      <option name="SUITE_NAME" />
+      <option name="PACKAGE_NAME" />
+      <option name="MAIN_CLASS_NAME" />
+      <option name="METHOD_NAME" />
+      <option name="GROUP_NAME" />
+      <option name="TEST_OBJECT" value="CLASS" />
+      <option name="VM_PARAMETERS" value="-ea" />
+      <option name="PARAMETERS" />
+      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$" />
+      <option name="OUTPUT_DIRECTORY" />
+      <option name="ANNOTATION_TYPE" />
+      <option name="ENV_VARIABLES" />
+      <option name="PASS_PARENT_ENVS" value="true" />
+      <option name="TEST_SEARCH_SCOPE">
+        <value defaultName="moduleWithDependencies" />
+      </option>
+      <option name="USE_DEFAULT_REPORTERS" value="false" />
+      <option name="PROPERTIES_FILE" />
+      <envs />
+      <properties />
+      <listeners />
     </configuration>
     <configuration default="true" type="#org.jetbrains.idea.devkit.run.PluginConfigurationType" factoryName="Plugin">
       <module name="" />
       <option name="VM_PARAMETERS" value="-Xmx512m -Xms256m -XX:MaxPermSize=250m" />
       <option name="PROGRAM_PARAMETERS" />
-      <method />
+      <predefined_log_file id="idea.log" enabled="true" />
     </configuration>
     <configuration default="true" type="AndroidRunConfigurationType" factoryName="Android Application">
       <module name="" />
@@ -503,33 +471,6 @@
       <option name="PREFERRED_AVD" value="" />
       <method />
     </configuration>
-    <configuration default="true" type="Applet" factoryName="Applet">
-      <module />
-      <option name="HTML_USED" value="false" />
-      <option name="WIDTH" value="400" />
-      <option name="HEIGHT" value="300" />
-      <option name="POLICY_FILE" value="$APPLICATION_HOME_DIR$/bin/appletviewer.policy" />
-      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
-      <method />
-    </configuration>
-    <configuration default="true" type="Application" factoryName="Application">
-      <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
-      <option name="MAIN_CLASS_NAME" value="UI.Gui" />
-      <option name="VM_PARAMETERS" value="" />
-      <option name="PROGRAM_PARAMETERS" value="" />
-      <option name="WORKING_DIRECTORY" value="file://$MODULE_DIR$" />
-      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
-      <option name="ALTERNATIVE_JRE_PATH" value="" />
-      <option name="ENABLE_SWING_INSPECTOR" value="false" />
-      <option name="ENV_VARIABLES" />
-      <option name="PASS_PARENT_ENVS" value="true" />
-      <module name="" />
-      <envs />
-      <method>
-        <option name="BuildArtifacts" enabled="true" />
-        <option name="Make" enabled="true" />
-      </method>
-    </configuration>
     <configuration default="true" type="ArquillianJUnit" factoryName="">
       <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
       <module name="" />
@@ -682,27 +623,6 @@
       <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
       <method />
     </configuration>
-    <configuration default="true" type="JUnit" factoryName="JUnit">
-      <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
-      <module name="" />
-      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
-      <option name="ALTERNATIVE_JRE_PATH" />
-      <option name="PACKAGE_NAME" />
-      <option name="MAIN_CLASS_NAME" />
-      <option name="METHOD_NAME" />
-      <option name="TEST_OBJECT" value="class" />
-      <option name="VM_PARAMETERS" value="-ea" />
-      <option name="PARAMETERS" />
-      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$" />
-      <option name="ENV_VARIABLES" />
-      <option name="PASS_PARENT_ENVS" value="true" />
-      <option name="TEST_SEARCH_SCOPE">
-        <value defaultName="moduleWithDependencies" />
-      </option>
-      <envs />
-      <patterns />
-      <method />
-    </configuration>
     <configuration default="true" type="JUnitTestDiscovery" factoryName="JUnit Test Discovery" changeList="All">
       <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
       <module name="" />
@@ -773,48 +693,12 @@
       <envs />
       <method />
     </configuration>
-    <configuration default="true" type="Remote" factoryName="Remote">
-      <option name="USE_SOCKET_TRANSPORT" value="true" />
-      <option name="SERVER_MODE" value="false" />
-      <option name="SHMEM_ADDRESS" value="javadebug" />
-      <option name="HOST" value="localhost" />
-      <option name="PORT" value="5005" />
-      <method />
-    </configuration>
     <configuration default="true" type="SpringBootApplicationConfigurationType" factoryName="Spring Boot">
       <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
       <module name="" />
       <envs />
       <method />
     </configuration>
-    <configuration default="true" type="TestNG" factoryName="TestNG">
-      <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
-      <module name="" />
-      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
-      <option name="ALTERNATIVE_JRE_PATH" />
-      <option name="SUITE_NAME" />
-      <option name="PACKAGE_NAME" />
-      <option name="MAIN_CLASS_NAME" />
-      <option name="METHOD_NAME" />
-      <option name="GROUP_NAME" />
-      <option name="TEST_OBJECT" value="CLASS" />
-      <option name="VM_PARAMETERS" value="-ea" />
-      <option name="PARAMETERS" />
-      <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$" />
-      <option name="OUTPUT_DIRECTORY" />
-      <option name="ANNOTATION_TYPE" />
-      <option name="ENV_VARIABLES" />
-      <option name="PASS_PARENT_ENVS" value="true" />
-      <option name="TEST_SEARCH_SCOPE">
-        <value defaultName="moduleWithDependencies" />
-      </option>
-      <option name="USE_DEFAULT_REPORTERS" value="false" />
-      <option name="PROPERTIES_FILE" />
-      <envs />
-      <properties />
-      <listeners />
-      <method />
-    </configuration>
     <configuration default="true" type="TestNGTestDiscovery" factoryName="TestNG Test Discovery" changeList="All">
       <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
       <module name="" />
@@ -843,6 +727,10 @@
       <listeners />
       <method />
     </configuration>
+    <configuration name="&lt;template&gt;" type="WebApp" default="true" selected="false">
+      <Host>localhost</Host>
+      <Port>5050</Port>
+    </configuration>
     <configuration default="true" type="js.build_tools.gulp" factoryName="Gulp.js">
       <node-interpreter>project</node-interpreter>
       <node-options />
@@ -866,21 +754,6 @@
     <configuration default="true" type="osgi.bnd.run" factoryName="Test Launcher (JUnit)">
       <method />
     </configuration>
-    <configuration default="false" name="nogui" type="Application" factoryName="Application">
-      <extension name="coverage" enabled="false" merge="false" sample_coverage="true" runner="idea" />
-      <option name="MAIN_CLASS_NAME" value="com.devbaltasarq.pooi.ui.App" />
-      <option name="VM_PARAMETERS" value="" />
-      <option name="PROGRAM_PARAMETERS" value="--nogui samples/init.txt" />
-      <option name="WORKING_DIRECTORY" value="file://$MODULE_DIR$" />
-      <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="false" />
-      <option name="ALTERNATIVE_JRE_PATH" />
-      <option name="ENABLE_SWING_INSPECTOR" value="false" />
-      <option name="ENV_VARIABLES" />
-      <option name="PASS_PARENT_ENVS" value="true" />
-      <module name="Pooi" />
-      <envs />
-      <method />
-    </configuration>
     <list size="2">
       <item index="0" class="java.lang.String" itemvalue="Application.nogui" />
       <item index="1" class="java.lang.String" itemvalue="Application.Gui" />
@@ -890,10 +763,6 @@
         <item index="0" class="java.lang.String" itemvalue="Application.Gui" />
       </list>
     </recent_temporary>
-    <configuration name="&lt;template&gt;" type="WebApp" default="true" selected="false">
-      <Host>localhost</Host>
-      <Port>5050</Port>
-    </configuration>
   </component>
   <component name="ShelveChangesManager" show_recycled="false">
     <option name="remove_strategy" value="false" />
@@ -1163,42 +1032,41 @@
     </todo-panel>
   </component>
   <component name="ToolWindowManager">
-    <frame x="54" y="-8" width="1320" height="772" extended-state="0" />
-    <editor active="false" />
+    <frame x="-4" y="0" width="1573" height="1050" extended-state="0" />
     <layout>
       <window_info id="Palette" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.32955405" sideWeight="0.5" order="0" side_tool="false" content_ui="tabs" />
       <window_info id="TODO" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.32903865" sideWeight="0.5" order="13" side_tool="false" content_ui="tabs" />
+      <window_info id="Messages" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.15015975" sideWeight="0.915683" order="2" side_tool="false" content_ui="tabs" />
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+      <window_info id="Run" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.17891374" sideWeight="0.6618541" order="6" side_tool="false" content_ui="tabs" />
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+      <window_info id="Terminal" active="true" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.3290735" sideWeight="0.5" order="11" side_tool="false" content_ui="tabs" />
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       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/objs/ObjectParent.java">
+    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/ui/VisualEngine.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="0">
-          <caret line="56" column="73" selection-start-line="56" selection-start-column="73" selection-end-line="56" selection-end-column="73" />
+        <state relative-caret-position="239">
+          <caret line="1115" column="30" lean-forward="true" selection-start-line="1115" selection-start-column="30" selection-end-line="1115" selection-end-column="30" />
+          <folding>
+            <element signature="e#12976#12977#0" expanded="false" />
+            <element signature="e#13031#13032#0" expanded="false" />
+            <element signature="e#29512#29513#0" expanded="false" />
+            <element signature="e#29605#29606#0" expanded="false" />
+            <element signature="e#29637#29638#0" expanded="false" />
+            <element signature="e#29677#29678#0" expanded="false" />
+            <element signature="e#30063#30064#0" expanded="false" />
+            <element signature="e#30105#30106#0" expanded="false" />
+            <element signature="e#36074#36075#0" expanded="false" />
+            <element signature="e#36116#36117#0" expanded="false" />
+            <element signature="e#36155#36156#0" expanded="false" />
+            <element signature="e#36197#36198#0" expanded="false" />
+            <element signature="e#39062#39063#0" expanded="false" />
+            <element signature="e#39103#39104#0" expanded="false" />
+            <element signature="e#39146#39147#0" expanded="false" />
+            <element signature="e#39185#39186#0" expanded="false" />
+          </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodIs.java">
+    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodIntAbs.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="0">
-          <caret line="13" column="13" selection-start-line="13" selection-start-column="13" selection-end-line="13" selection-end-column="13" />
+        <state relative-caret-position="306">
+          <caret line="26" column="0" lean-forward="true" selection-start-line="26" selection-start-column="0" selection-end-line="26" selection-end-column="0" />
+          <folding />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/res/scripts/math.poi">
+    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/AppInfo.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="0">
-          <caret line="19" column="25" selection-start-line="19" selection-start-column="0" selection-end-line="19" selection-end-column="0" />
+        <state relative-caret-position="493">
+          <caret line="32" column="0" lean-forward="true" selection-start-line="32" selection-start-column="0" selection-end-line="32" selection-end-column="0" />
+          <folding />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodEmbed.java" />
-    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/ObjectBag.java">
+    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/Command.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="0">
-          <caret line="569" column="68" selection-start-line="569" selection-start-column="68" selection-end-line="569" selection-end-column="68" />
+        <state relative-caret-position="302">
+          <caret line="116" column="18" lean-forward="false" selection-start-line="116" selection-start-column="18" selection-end-line="116" selection-end-column="18" />
+          <folding />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/Method.java">
+    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodBoolNot.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="0">
-          <caret line="103" column="39" selection-start-line="103" selection-start-column="28" selection-end-line="103" selection-end-column="28" />
+        <state relative-caret-position="221">
+          <caret line="20" column="71" lean-forward="true" selection-start-line="20" selection-start-column="71" selection-end-line="20" selection-end-column="71" />
+          <folding />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/InterpretedMethod.java">
+    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/NativeMethod.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="0">
-          <caret line="140" column="0" selection-start-line="140" selection-start-column="0" selection-end-line="140" selection-end-column="0" />
+        <state relative-caret-position="566">
+          <caret line="54" column="59" lean-forward="false" selection-start-line="54" selection-start-column="59" selection-end-line="54" selection-end-column="59" />
+          <folding>
+            <element signature="e#1529#1530#0" expanded="true" />
+            <element signature="e#1601#1602#0" expanded="true" />
+          </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/Interpreter.java">
+    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/Method.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="0">
-          <caret line="346" column="101" selection-start-line="346" selection-start-column="17" selection-end-line="346" selection-end-column="17" />
+        <state relative-caret-position="248">
+          <caret line="74" column="18" lean-forward="false" selection-start-line="74" selection-start-column="18" selection-end-line="74" selection-end-column="18" />
           <folding />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/AppInfo.java">
+    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/InterpretedMethod.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="0">
-          <caret line="15" column="54" selection-start-line="15" selection-start-column="54" selection-end-line="15" selection-end-column="54" />
+        <state relative-caret-position="246">
+          <caret line="218" column="25" lean-forward="false" selection-start-line="218" selection-start-column="25" selection-end-line="218" selection-end-column="25" />
+          <folding>
+            <element signature="e#6873#6874#0" expanded="true" />
+            <element signature="e#6920#6921#0" expanded="true" />
+          </folding>
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodCopy.java">
+    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/Parser.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="0">
-          <caret line="32" column="0" selection-start-line="32" selection-start-column="0" selection-end-line="33" selection-end-column="0" />
+        <state relative-caret-position="212">
+          <caret line="181" column="50" lean-forward="true" selection-start-line="181" selection-start-column="50" selection-end-line="181" selection-end-column="50" />
+          <folding />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodIntSubstract.java">
+    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/Reserved.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="0">
-          <caret line="44" column="84" selection-start-line="44" selection-start-column="16" selection-end-line="44" selection-end-column="84" />
+        <state relative-caret-position="629">
+          <caret line="40" column="0" lean-forward="false" selection-start-line="40" selection-start-column="0" selection-end-line="40" selection-end-column="0" />
+          <folding />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodIntReal.java" />
-    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/ui/VisualEngine.java">
+    <entry file="file://$PROJECT_DIR$/samples/point.txt">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="1156">
-          <caret line="716" column="33" selection-start-line="716" selection-start-column="33" selection-end-line="716" selection-end-column="33" />
+        <state relative-caret-position="221">
+          <caret line="13" column="0" lean-forward="true" selection-start-line="13" selection-start-column="0" selection-end-line="13" selection-end-column="0" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/objs/ObjectParent.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="265">
+          <caret line="45" column="9" lean-forward="true" selection-start-line="45" selection-start-column="9" selection-end-line="45" selection-end-column="9" />
           <folding />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodRealInt.java" />
-    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodRealRound.java" />
     <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/Runtime.java">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="1955">
-          <caret line="126" column="77" selection-start-line="126" selection-start-column="77" selection-end-line="126" selection-end-column="77" />
+        <state relative-caret-position="153">
+          <caret line="39" column="36" lean-forward="false" selection-start-line="39" selection-start-column="36" selection-end-line="39" selection-end-column="36" />
           <folding>
             <element signature="imports" expanded="true" />
+            <element signature="e#14283#14284#0" expanded="true" />
+            <element signature="e#14313#14314#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/com/devbaltasarq/pooi/core/ObjectBag.java">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="373">
+          <caret line="629" column="0" lean-forward="true" selection-start-line="629" selection-start-column="0" selection-end-line="629" selection-end-column="0" />
+          <folding>
+            <element signature="e#904#905#0" expanded="true" />
+            <element signature="e#942#943#0" expanded="true" />
+            <element signature="e#987#988#0" expanded="true" />
+            <element signature="e#1021#1022#0" expanded="true" />
+            <element signature="e#1074#1075#0" expanded="true" />
+            <element signature="e#1112#1113#0" expanded="true" />
+            <element signature="e#23740#23741#0" expanded="true" />
+            <element signature="e#23793#23794#0" expanded="true" />
+            <element signature="e#25322#25323#0" expanded="true" />
+            <element signature="e#25372#25373#0" expanded="true" />
+            <element signature="e#31336#31337#0" expanded="true" />
+            <element signature="e#31368#31369#0" expanded="true" />
           </folding>
         </state>
       </provider>
@@ -1632,7 +1574,7 @@
       </state>
       <state key="ProjectJDKs.UI">
         <settings>
-          <last-edited>1.7</last-edited>
+          <last-edited>1.8</last-edited>
           <splitter-proportions>
             <option name="proportions">
               <list>
diff --git a/src/com/devbaltasarq/pooi/core/AppInfo.java b/src/com/devbaltasarq/pooi/core/AppInfo.java
index ea22e3a..0031305 100644
--- a/src/com/devbaltasarq/pooi/core/AppInfo.java
+++ b/src/com/devbaltasarq/pooi/core/AppInfo.java
@@ -13,7 +13,7 @@ public class AppInfo {
     public static final String Name = "Pooi";
     public static final String Email = "jbgarcia@uvigo.es";
     public static final String Author = "Baltasar García Perez-Schofield";
-    public static final String Version = "1.9 20160629";
+    public static final String Version = "2.0 20180116";
     public static final String License = "MIT License: https://opensource.org/licenses/MIT";
     public static final String SessionFileExt = ".txt";
     public static final String ScriptFileExt = ".poi";
diff --git a/src/com/devbaltasarq/pooi/core/ObjectBag.java b/src/com/devbaltasarq/pooi/core/ObjectBag.java
index 3690fdc..0820fa6 100644
--- a/src/com/devbaltasarq/pooi/core/ObjectBag.java
+++ b/src/com/devbaltasarq/pooi/core/ObjectBag.java
@@ -22,15 +22,18 @@ public class ObjectBag {
      *  Its objective is to wrap a method in the list of available methods in this object.
      */
     public static class Slot {
-        public Slot(Method mth) {
+        public Slot(Method mth)
+        {
             this.mth = mth;
         }
 
-        public Method getMethod() {
+        public Method getMethod()
+        {
             return mth;
         }
 
-        public void setMethod(Method mth) {
+        public void setMethod(Method mth)
+        {
             this.mth = mth;
         }
 
@@ -582,7 +585,7 @@ public void set(String name, ObjectBag obj) throws InterpretError
             obj.setName( name );
         }
 
-        // Change the container of the pointed object, if apropriated
+        // Change the container of the pointed object, if appropriated
         if ( !isParent
           && obj instanceof ValueObject )
         {
@@ -612,26 +615,23 @@ public void embed(String name, ObjectBag obj) throws InterpretError
      */
     public void set(String name, Method mth) throws InterpretError
     {
-        this.chkIdentifierForMemberName( name );
-        this.setMethod( name, mth );
+        this.set( name, mth, Check );
     }
-
-    /**
-     * Returns a member, local to this object, given a name.
-     * @param id A String containing the name.
-     * @return The member corresponding to that id, or null.
+    /** Adds a new method to the list of methods of this object
+     * @param name The name of this new method
+     * @param mth The Method itself
+     * @throws com.devbaltasarq.pooi.core.Interpreter.InterpretError if name is not valid
      */
-    public Member localLookUpMember(String id) {
-        Member toret = localLookUpAttribute( id );
-
-        if ( toret == null ) {
-            toret = localLookUpMethod( id );
+    public void set(String name, Method mth, boolean check) throws InterpretError
+    {
+        if ( check ) {
+            this.chkIdentifierForMemberName(name);
         }
 
-        return toret;
+        this.setMethod( name, mth );
     }
 
-    protected final void setMethod(String name, Method mth) throws InterpretError
+    protected final void setMethod(String name, Method mth)
     {
         final Slot slot = this.lookUpSlot( name );
 
@@ -648,7 +648,6 @@ protected final void setMethod(String name, Method mth) throws InterpretError
     protected final void setAttribute(String name, ObjectBag obj) throws InterpretError
     {
         boolean isParent = name.equals( ParentAttribute.ParentAttributeName );
-        final Runtime rt = this.getRuntime();
         Attribute atr = localLookUpAttribute( name );
 
         // Chk cycles in parent graph
@@ -721,7 +720,8 @@ public void renameMember(String oldName, String newName) throws InterpretError
         return;
     }
 
-    public void renameMethod(String oldName, String newName) throws InterpretError {
+    public void renameMethod(String oldName, String newName) throws InterpretError
+    {
         final Slot slot = this.lookUpSlot( oldName );
 
         if ( slot != null ) {
@@ -750,7 +750,8 @@ public void renameMethod(String oldName, String newName) throws InterpretError {
         return;
     }
 
-    public void renameAttribute(String oldName, String newName) throws InterpretError {
+    public void renameAttribute(String oldName, String newName) throws InterpretError
+    {
         final Attribute attr = this.localLookUpAttribute( oldName );
         ObjectBag ref = null;
 
@@ -846,7 +847,8 @@ public Method localLookUpMethod(String mthName)
      * @param mthName The name of the method.
      * @return A Slot object pointing to the method, null otherwise.
      */
-    public Slot lookUpSlot(String mthName) {
+    public Slot lookUpSlot(String mthName)
+    {
         return this.methods.get( mthName );
     }
 
diff --git a/src/com/devbaltasarq/pooi/core/Parser.java b/src/com/devbaltasarq/pooi/core/Parser.java
index 5d1f4fd..16d4ee0 100644
--- a/src/com/devbaltasarq/pooi/core/Parser.java
+++ b/src/com/devbaltasarq/pooi/core/Parser.java
@@ -145,7 +145,6 @@ private static String getMessageId(Lexer lex)
     {
         char ch;
         String toret = "";
-        Lexer.TokenType tokenType;
 
         // Decide which kind of message, native: *,+,-... or average
         lex.skipSpaces();
diff --git a/src/com/devbaltasarq/pooi/core/Reserved.java b/src/com/devbaltasarq/pooi/core/Reserved.java
index 354327f..a3e8122 100644
--- a/src/com/devbaltasarq/pooi/core/Reserved.java
+++ b/src/com/devbaltasarq/pooi/core/Reserved.java
@@ -8,6 +8,8 @@
 public class Reserved {
 
     public static final String ParentAttribute = "parent";
+    public static final String SetMethod = "set";
+
 
     public static final String RootObject = "Root";
     public static final String LibObject = "Lib";
@@ -17,6 +19,7 @@ public class Reserved {
     public static final String BoolObject = "Bool";
     public static final String RealObject = "Real";
     public static final String StrObject = "Str";
+    public static final String DateTimeObject = "DateTime";
     public static final String SelfRef = "self";
     public static final String AssignmentOperator = "=";
     public static final String AllowedSymbolsInMethodName = "!<>+-*/=?^";
@@ -31,6 +34,8 @@ public class Reserved {
             + ' ' + RealObject + ' '
             + ' ' + StrObject + ' '
             + ' ' + AssignmentOperator + ' '
+            + ' ' + DateTimeObject + ' '
+            + ' ' + SetMethod + ' '
     ;
 
     public static boolean isReservedForObjects(String id)
diff --git a/src/com/devbaltasarq/pooi/core/Runtime.java b/src/com/devbaltasarq/pooi/core/Runtime.java
index 2e9a61a..84ef9fc 100644
--- a/src/com/devbaltasarq/pooi/core/Runtime.java
+++ b/src/com/devbaltasarq/pooi/core/Runtime.java
@@ -81,7 +81,7 @@ private Runtime() throws InterpretError
         this.getLiteralsContainer().clear( false );
     }
 
-    public void addMethodsToRuntimeObjects() throws InterpretError
+    private void addMethodsToRuntimeObjects() throws InterpretError
     {
         // Int
         this.integer.set( NativeMethodIntSum.EtqMthIntSum, new NativeMethodIntSum( this ) );
@@ -116,6 +116,10 @@ public void addMethodsToRuntimeObjects() throws InterpretError
         this.real.set( NativeMethodRealInt.EtqMthInt, new NativeMethodRealInt( this ) );
         this.real.set( NativeMethodRealRound.EtqMthRound, new NativeMethodRealRound( this ) );
 
+        // Bool
+        this.bool.set( NativeMethodBoolNot.EtqMthBoolNot, new NativeMethodBoolNot( this ) );
+        this.bool.set( NativeMethodBoolIsTrue.EtqMthBoolIsTrue, new NativeMethodBoolIsTrue( this ) );
+
         // Str
         this.str.set( NativeMethodStrConcat.EtqMthStrConcat, new NativeMethodStrConcat( this ) );
         this.str.set( NativeMethodStrConcatAssign.EtqMthStrConcatAssign, new NativeMethodStrConcatAssign( this ) );
diff --git a/src/com/devbaltasarq/pooi/core/evaluables/Method.java b/src/com/devbaltasarq/pooi/core/evaluables/Method.java
index cd8dfef..927f6ca 100644
--- a/src/com/devbaltasarq/pooi/core/evaluables/Method.java
+++ b/src/com/devbaltasarq/pooi/core/evaluables/Method.java
@@ -83,7 +83,10 @@ public String getFormalParametersAsString() {
         return toret.toString().trim();
     }
 
-    /** @return Gets the body of the method as a representation in text */
+    /** @return Gets the body of the method as a representation in text
+     *  Native methods return with something like "{: }", which is enough.
+     *  Interpreted methods must be represented accurately.
+     */
     public abstract String getMethodBodyAsString();
 
     /**
diff --git a/src/com/devbaltasarq/pooi/core/evaluables/methods/InterpretedMethod.java b/src/com/devbaltasarq/pooi/core/evaluables/methods/InterpretedMethod.java
index 18a05b0..d40db18 100644
--- a/src/com/devbaltasarq/pooi/core/evaluables/methods/InterpretedMethod.java
+++ b/src/com/devbaltasarq/pooi/core/evaluables/methods/InterpretedMethod.java
@@ -12,11 +12,7 @@
 import java.util.HashMap;
 import java.util.Stack;
 
-/**
- * Method holding interpreted code.
- * User: baltasarq
- * Date: 11/19/12
- */
+/** Method holding interpreted code. */
 public class InterpretedMethod extends Method {
     public static final String DefaultMethodId = "__mth_";
 
@@ -113,6 +109,7 @@ public void addCmds(String cmd) throws InterpretError
         this.stackCmds.addAll( Arrays.asList( Parser.parseOrder( this.getRuntime(), cmd ) ) );
     }
 
+    @Override
     public InterpretedMethod copy()
     {
         InterpretedMethod toret = new InterpretedMethod( this.getRuntime(), this.getName() );
@@ -120,7 +117,7 @@ public InterpretedMethod copy()
         // Commands
         toret.stackCmds.addAll( Arrays.asList( this.getCmds() ) );
 
-        // Formal paramenters
+        // Formal parameters
         toret.formalParams = this.formalParams.clone();
 
         // Slots for real parameters
@@ -153,60 +150,68 @@ public String[] getFormalParameters()
     }
 
     @Override
-    public String getMethodBodyAsString() {
-        Stack<String> stack = new Stack<>();
+    public String getMethodBodyAsString()
+    {
         StringBuilder toret = new StringBuilder();
-
-        toret.append( "{" );
+        Stack<String> stack = new Stack<>();
+        ArrayList<Integer> positions = new ArrayList<>();
 
         // Add params
-        for(String param: this.getFormalParameters()) {
-            toret.append( param );
-            toret.append( ' ' );
-        }
-
+        toret.append( "{ " );
+        toret.append( this.getFormalParametersAsString() );
         toret.append( ": " );
 
         // Add commands
         for(Command cmd: this.getCmds()) {
-            String replaceCmd = "";
+            toret.append( cmd.toString() );
+            toret.append( "; " );
+        }
+/*
+        // Add commands
+        for(Command cmd: this.getCmds()) {
+            String replaceCmd;
             String cmdAsStr = cmd.toString();
-            int pos = cmdAsStr.indexOf( Parser.PopTask );
 
-            if ( pos >= 0 ) {
-                // Process the reference
-                if ( cmd.getReference().toString().equals( Parser.PopTask ) ) {
-                    replaceCmd = stack.pop();
-                    cmdAsStr = cmdAsStr.substring( 0, pos )
-                            + replaceCmd
-                            + cmdAsStr.substring( pos + Parser.PopTask.length(), cmdAsStr.length() );
+            // Find all POP occurrences
+            positions.clear();
+            int popPos = cmdAsStr.lastIndexOf( Parser.PopTask );
+            do {
+                while( popPos > -1 ) {
+                    positions.add( popPos );
+                    cmdAsStr.lastIndexOf( Parser.PopTask, popPos - Parser.PopTask.length() );
                 }
 
-                // Process possible targets
-                pos += replaceCmd.length();
-                pos = cmdAsStr.indexOf( Parser.PopTask, pos );
-                while( pos >= 0 ) {
+                for(int pos: positions) {
+                    // Process possible targets
+    //                pos += replaceCmd.length();
+    //                pos = cmdAsStr.indexOf( Parser.PopTask, pos );
                     replaceCmd = stack.pop();
                     cmdAsStr = cmdAsStr.substring( 0, pos )
                             + replaceCmd
                             + cmdAsStr.substring( pos + Parser.PopTask.length(), cmdAsStr.length() );
-
-                    // Next?
-                    pos += replaceCmd.length();
-                    pos = cmdAsStr.indexOf( Parser.PopTask, pos );
                 }
-            }
 
+                popPos = cmdAsStr.lastIndexOf( Parser.PopTask );
+            } while( popPos > -1 );
+/*
+            // Process the reference
+            if ( cmd.getReference().toString().equals( Parser.PopTask ) ) {
+                replaceCmd = stack.pop();
+                cmdAsStr = cmdAsStr.substring( 0, popPos )
+                        + replaceCmd
+                        + cmdAsStr.substring( popPos + Parser.PopTask.length(), cmdAsStr.length() );
+            }
+*/
+/*
             // Push command
             stack.push( cmdAsStr );
         }
 
-        // Dump the remaining
+        // Dump the remaining in natural order (nearly never executed)
         for(String strCmd: stack) {
             toret.append( strCmd );
-            toret.append( "; " );
         }
-
+*/
         toret.append( "}" );
         return toret.toString();
     }
@@ -221,6 +226,7 @@ public static String createNewMethodId()
         return toret;
     }
 
+    @Override
     public int getNumParams() {
         return this.formalParams.length;
     }
diff --git a/src/com/devbaltasarq/pooi/core/evaluables/methods/NativeMethod.java b/src/com/devbaltasarq/pooi/core/evaluables/methods/NativeMethod.java
index aab9918..51ae9bb 100644
--- a/src/com/devbaltasarq/pooi/core/evaluables/methods/NativeMethod.java
+++ b/src/com/devbaltasarq/pooi/core/evaluables/methods/NativeMethod.java
@@ -8,9 +8,8 @@
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
 
-/**
- * Representing available methods in the interpreter
- * @author baltasarq
+/** Representing available methods in the interpreter
+ *  @author baltasarq
  */
 public abstract class NativeMethod extends Method {
 
@@ -26,9 +25,8 @@ public NativeMethod(com.devbaltasarq.pooi.core.Runtime rt, String name)
     public abstract ObjectBag doIt(ObjectBag ref, Evaluable[] params, StringBuilder msg)
             throws InterpretError;
 
-    /**
-     * Copy the needed NativeMethod by means of reflection
-     * @return The copied method, as a Method object.
+    /** Copy the needed NativeMethod by means of reflection
+     *  @return The copied method, as a Method object.
      */
     @Override
     public NativeMethod copy()
@@ -48,8 +46,12 @@ public NativeMethod copy()
         return toret;
     }
 
+    /** Return A textual representation of the method
+     *  @return A string describing the method.
+     */
     @Override
-    public String getMethodBodyAsString() {
-        return "{: }";
+    public String getMethodBodyAsString()
+    {
+        return "{ " + this.getFormalParametersAsString() + ": }";
     }
 }
diff --git a/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodBoolIsTrue.java b/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodBoolIsTrue.java
new file mode 100644
index 0000000..f4fb7b0
--- /dev/null
+++ b/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodBoolIsTrue.java
@@ -0,0 +1,48 @@
+package com.devbaltasarq.pooi.core.evaluables.methods.nativemethods;
+
+import com.devbaltasarq.pooi.core.Evaluable;
+import com.devbaltasarq.pooi.core.Interpreter;
+import com.devbaltasarq.pooi.core.ObjectBag;
+import com.devbaltasarq.pooi.core.evaluables.methods.NativeMethod;
+import com.devbaltasarq.pooi.core.objs.ObjectBool;
+
+public class NativeMethodBoolIsTrue extends NativeMethod {
+    public static final String EtqMthBoolIsTrue = "true?";
+
+    public NativeMethodBoolIsTrue(com.devbaltasarq.pooi.core.Runtime rt)
+    {
+        super( rt, EtqMthBoolIsTrue );
+    }
+
+    @Override
+    public ObjectBag doIt(ObjectBag ref, Evaluable[] params, StringBuilder msg)
+            throws Interpreter.InterpretError
+    {
+        final com.devbaltasarq.pooi.core.Runtime rt = ref.getRuntime();
+
+        chkParametersNumber( 0, params );
+
+        if ( !( ref instanceof ObjectBool) ) {
+            throw new Interpreter.InterpretError(
+                    "Semantic error: expected Bool in '"
+                            + ref.getName()
+                            + '\''
+            );
+        }
+
+        final boolean result = ( ( (ObjectBool) ref ).getValue() );
+
+        msg.append( Boolean.toString( result ) );
+        return rt.createBool( result );
+    }
+
+    @Override
+    public int getNumParams() {
+        return 0;
+    }
+
+    @Override
+    public String[] getFormalParameters() {
+        return new String[ 0 ];
+    }
+}
diff --git a/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodBoolNot.java b/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodBoolNot.java
new file mode 100644
index 0000000..b6b818f
--- /dev/null
+++ b/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodBoolNot.java
@@ -0,0 +1,48 @@
+package com.devbaltasarq.pooi.core.evaluables.methods.nativemethods;
+
+import com.devbaltasarq.pooi.core.Evaluable;
+import com.devbaltasarq.pooi.core.Interpreter;
+import com.devbaltasarq.pooi.core.ObjectBag;
+import com.devbaltasarq.pooi.core.evaluables.methods.NativeMethod;
+import com.devbaltasarq.pooi.core.objs.ObjectBool;
+
+public class NativeMethodBoolNot extends NativeMethod {
+    public static final String EtqMthBoolNot= "not";
+
+    public NativeMethodBoolNot(com.devbaltasarq.pooi.core.Runtime rt)
+    {
+        super( rt, EtqMthBoolNot );
+    }
+
+    @Override
+    public ObjectBag doIt(ObjectBag ref, Evaluable[] params, StringBuilder msg)
+            throws Interpreter.InterpretError
+    {
+        final com.devbaltasarq.pooi.core.Runtime rt = ref.getRuntime();
+
+        chkParametersNumber( 0, params );
+
+        if ( !( ref instanceof ObjectBool) ) {
+            throw new Interpreter.InterpretError(
+                    "Semantic error: expected Bool in '"
+                            + ref.getName()
+                            + '\''
+            );
+        }
+
+        final boolean result = !( ( (ObjectBool) ref ).getValue() );
+
+        msg.append( Boolean.toString( result ) );
+        return rt.createBool( result );
+    }
+
+    @Override
+    public int getNumParams() {
+        return 0;
+    }
+
+    @Override
+    public String[] getFormalParameters() {
+        return new String[ 0 ];
+    }
+}
diff --git a/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodCopy.java b/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodCopy.java
index db1731b..a662f65 100644
--- a/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodCopy.java
+++ b/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodCopy.java
@@ -38,6 +38,7 @@ public ObjectBag doIt(ObjectBag ref, Evaluable[] params, StringBuilder msg)
         return toret;
     }
 
+    @Override
     public int getNumParams() {
         return 0;
     }
diff --git a/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodIntAbs.java b/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodIntAbs.java
index 0ddf78c..a23ca24 100644
--- a/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodIntAbs.java
+++ b/src/com/devbaltasarq/pooi/core/evaluables/methods/nativemethods/NativeMethodIntAbs.java
@@ -41,6 +41,7 @@ public ObjectBag doIt(ObjectBag ref, Evaluable[] params, StringBuilder msg)
         return rt.createInt( result );
     }
 
+    @Override
     public int getNumParams() {
         return 0;
     }
diff --git a/src/com/devbaltasarq/pooi/core/objs/ObjectParent.java b/src/com/devbaltasarq/pooi/core/objs/ObjectParent.java
index 31feb2e..9e52295 100644
--- a/src/com/devbaltasarq/pooi/core/objs/ObjectParent.java
+++ b/src/com/devbaltasarq/pooi/core/objs/ObjectParent.java
@@ -59,7 +59,7 @@ public void registerCommonMethods() throws InterpretError
         this.set( NativeMethodGetPath.EtqMthPath, new NativeMethodGetPath( this.getRuntime() ) );
         this.set( NativeMethodErase.EtqMthErase, new NativeMethodErase( this.getRuntime() ) );
         this.set( NativeMethodGetName.EtqMthGetName, new NativeMethodGetName( this.getRuntime() ) );
-        this.set( NativeMethodSet.EtqMthSet, new NativeMethodSet( this.getRuntime() ) );
+        this.set( NativeMethodSet.EtqMthSet, new NativeMethodSet( this.getRuntime() ), DontCheck );
         this.set( NativeMethodCopy.EtqMthCopy, new NativeMethodCopy( this.getRuntime() ) );
         this.set( NativeMethodCreateChild.EtqMthCreateChild, new NativeMethodCreateChild( this.getRuntime() ) );
         this.set( NativeMethodSetName.EtqMthSetName, new NativeMethodSetName( this.getRuntime() ) );
diff --git a/src/com/devbaltasarq/pooi/ui/VisualEngine.java b/src/com/devbaltasarq/pooi/ui/VisualEngine.java
index 4a3e145..168269e 100644
--- a/src/com/devbaltasarq/pooi/ui/VisualEngine.java
+++ b/src/com/devbaltasarq/pooi/ui/VisualEngine.java
@@ -41,11 +41,11 @@
  * @author  baltasarq
  */
 public class VisualEngine extends JFrame {
-    public static final int MinFontSize = 10;
-    public static final int MaxFontSize = 32;
-    public static final String EtqIconApp = "icons/pooiIcon.png";
-    public static final String EtqIconReset = "icons/reset.png";
-    public static final String EtqIconNew = "icons/new.png";
+    private static final int MinFontSize = 10;
+    private static final int MaxFontSize = 32;
+    private static final String EtqIconApp = "icons/pooiIcon.png";
+    private static final String EtqIconReset = "icons/reset.png";
+    private static final String EtqIconNew = "icons/new.png";
     
     /** Creates new form VisualEngine */
     public VisualEngine(Interpreter interpreter)
@@ -305,7 +305,7 @@ private void buildOutput()
         this.output.setBackground( new java.awt.Color( 0, 0, 0 ) );
         this.output.setColumns( 20 );
         this.output.setEditable( false );
-        this.output.setFont( new java.awt.Font( "Courier New", 0, 14 ) );
+        this.output.setFont( new java.awt.Font( "Courier New", Font.PLAIN, 14 ) );
         this.output.setForeground( new java.awt.Color( 255, 255, 255 ) );
         this.output.setRows( 5 );
         this.output.setCursor(new java.awt.Cursor( java.awt.Cursor.DEFAULT_CURSOR ) );
@@ -347,7 +347,7 @@ private void buildTreeView()
         trObjectsTree = new JTree();
         trObjectsTree.addTreeSelectionListener( new TreeSelectionListener() {
             public void valueChanged(TreeSelectionEvent evt) {
-                onSelectedItemChanged( evt.getNewLeadSelectionPath() );
+                onSelectedItemChanged();
             }
         } );
         trObjectsTree.addMouseListener( new MouseListener() {
@@ -699,50 +699,51 @@ private void onAbout()
     private void onInputEntered()
     {
         String msg = (String) this.input.getSelectedItem();
-        msg = msg.trim();
 
-        try {
-            if ( this.input.isEnabled()
-              && !msg.isEmpty() )
-            {
-                this.input.setEnabled( false );
-                this.input.setSelectedItem( "" );
-
-                // Show the order in the output panel
-                this.output.append( "> " + msg + "\n" ) ;
-
-                // Interpret the order
-                this.output.append( interpreter.interpret( msg ) );
-                this.output.append( "\n\n" );
-                this.output.setCaretPosition( output.getText().length() );
+        if ( msg != null ) {
+            msg = msg.trim();
 
-                // Check for the root existing -- if not, end
-                if ( this.interpreter.getRuntime().getRoot() == null ) {
-                    this.close();
-                }
+            try {
+                if (this.input.isEnabled()
+                        && !msg.isEmpty()) {
+                    this.input.setEnabled(false);
+                    this.input.setSelectedItem("");
+
+                    // Show the order in the output panel
+                    this.output.append("> " + msg + "\n");
+
+                    // Interpret the order
+                    this.output.append(interpreter.interpret(msg));
+                    this.output.append("\n\n");
+                    this.output.setCaretPosition(output.getText().length());
+
+                    // Check for the root existing -- if not, end
+                    if (this.interpreter.getRuntime().getRoot() == null) {
+                        this.close();
+                    }
 
-                // Set it to the order history
-                this.input.insertItemAt( msg, 0  );
+                    // Set it to the order history
+                    this.input.insertItemAt(msg, 0);
 
-                if ( this.input.getItemCount() >= 10 ) {
-                    this.input.removeItemAt( 9 );
+                    if (this.input.getItemCount() >= 10) {
+                        this.input.removeItemAt(9);
+                    }
                 }
+            } catch (StackOverflowError exc) {
+                this.output.append("\n\n*** INTERNAL ERROR: stack overflow\n\n");
+            } catch (NullPointerException exc) {
+                this.output.append("\n\n*** INTERNAL ERROR: rogue null pointer\n\n");
+            } catch (Exception exc) {
+                this.output.append("\n\n*** INTERNAL ERROR: " + exc.getMessage() + "\n\n");
+            } finally {
+                this.updateTree();
+                this.updateDiagram();
+                this.input.setEnabled(true);
+                this.input.requestFocus();
             }
-        } catch(StackOverflowError exc) {
-            this.output.append( "\n\n*** INTERNAL ERROR: stack overflow\n\n" );
-        }
-        catch(NullPointerException exc) {
-            this.output.append( "\n\n*** INTERNAL ERROR: rogue null pointer\n\n" );
-        }
-        catch(Exception exc) {
-            this.output.append( "\n\n*** INTERNAL ERROR: " + exc.getMessage() + "\n\n" );
-        }
-        finally {
-            this.updateTree();
-            this.updateDiagram();
-            this.input.setEnabled( true );
-            this.input.requestFocus();
         }
+
+        return;
     }
 
     private void setSelectedObject(ObjectBag obj)
@@ -794,14 +795,14 @@ private String getSelectedObjectPath() {
         return toret.toString();
     }
 
-    private void onSelectedItemChanged(TreePath treePath)
+    private void onSelectedItemChanged()
     {
         if ( !rebuildingTree ) {
             rebuildingTree = true;
             String path = this.getSelectedObjectPath();
 
             if ( !path.isEmpty() ) {
-                this.input.setSelectedItem(path.toString());
+                this.input.setSelectedItem( path.toString() );
             }
 
             this.input.requestFocusInWindow();
@@ -996,8 +997,8 @@ public void updateDiagram()
             Dimension dimChild = box.getMeasuredDimension();
             Dimension dimParent = parentBox.getMeasuredDimension();
 
-            int childPosX = box.getX() + ( (int) ( dimChild.width / 2 ) );
-            int parentPosX = parentBox.getX() + ( (int) ( dimParent.width / 2 ) );
+            int childPosX = box.getX() + ( dimChild.width / 2 );
+            int parentPosX = parentBox.getX() + ( dimParent.width / 2 );
             this.pnlCanvas.drawLine( childPosX, box.getY(), parentPosX, parentBox.getY() + dimParent.height  );
         }
 
@@ -1088,7 +1089,7 @@ private void addNodes(DefaultMutableTreeNode node, ObjectBag obj, HashSet<Object
 
     public String makeInput(String msg)
     {
-        String toret = (String) JOptionPane.showInputDialog(
+        String toret = JOptionPane.showInputDialog(
                 this,
                 msg,
                 AppInfo.Name,