diff --git a/deploy_blockchain_genesis_onprem.sh b/deploy_blockchain_genesis_onprem.sh
index 856e3dfc4..10ba48735 100644
--- a/deploy_blockchain_genesis_onprem.sh
+++ b/deploy_blockchain_genesis_onprem.sh
@@ -29,8 +29,16 @@ if [[ ! $2 =~ $number_re ]] ; then
     printf "Invalid <# of Shards> argument: $2\n"
     exit
 fi
+if [[ $3 -lt 0 ]] || [[ $3 -gt 4 ]]; then
+    printf "Invalid <Parent Node Index Begin> argument: $3\n"
+    exit
+fi
 PARENT_NODE_INDEX_BEGIN=$3
 printf "PARENT_NODE_INDEX_BEGIN=$PARENT_NODE_INDEX_BEGIN\n"
+if [[ $4 -lt 0 ]] || [[ $4 -gt 4 ]]; then
+    printf "Invalid <Parent Node Index End> argument: $4\n"
+    exit
+fi
 PARENT_NODE_INDEX_END=$4
 printf "PARENT_NODE_INDEX_END=$PARENT_NODE_INDEX_END\n"
 printf "\n"
diff --git a/deploy_blockchain_incremental_gcp.sh b/deploy_blockchain_incremental_gcp.sh
index 9eeb88ddf..4fa960546 100644
--- a/deploy_blockchain_incremental_gcp.sh
+++ b/deploy_blockchain_incremental_gcp.sh
@@ -352,7 +352,7 @@ function deploy_node() {
 
     # 5. Wait until node is synced
     printf "\n\n<<< Waiting until node $node_index is synced >>>\n\n"
-    WAIT_CMD="gcloud compute ssh $node_target_addr --command 'cd \$(find /home/ain-blockchain* -maxdepth 0 -type d); . wait_until_node_sync.sh' --project $PROJECT_ID --zone $node_zone"
+    WAIT_CMD="gcloud compute ssh $node_target_addr --command 'cd \$(find /home/ain-blockchain* -maxdepth 0 -type d); . wait_until_node_sync.sh $node_url' --project $PROJECT_ID --zone $node_zone"
     printf "WAIT_CMD=$WAIT_CMD\n\n"
     eval $WAIT_CMD
 }
diff --git a/deploy_blockchain_incremental_onprem.sh b/deploy_blockchain_incremental_onprem.sh
index 9b6d7234f..fa335cb40 100644
--- a/deploy_blockchain_incremental_onprem.sh
+++ b/deploy_blockchain_incremental_onprem.sh
@@ -29,8 +29,16 @@ if [[ ! $2 =~ $number_re ]] ; then
     printf "Invalid <# of Shards> argument: $2\n"
     exit
 fi
+if [[ $3 -lt 0 ]] || [[ $3 -gt 4 ]]; then
+    printf "Invalid <Parent Node Index Begin> argument: $3\n"
+    exit
+fi
 PARENT_NODE_INDEX_BEGIN=$3
 printf "PARENT_NODE_INDEX_BEGIN=$PARENT_NODE_INDEX_BEGIN\n"
+if [[ $4 -lt 0 ]] || [[ $4 -gt 4 ]]; then
+    printf "Invalid <Parent Node Index End> argument: $4\n"
+    exit
+fi
 PARENT_NODE_INDEX_END=$4
 printf "PARENT_NODE_INDEX_END=$PARENT_NODE_INDEX_END\n"
 printf "\n"
@@ -339,7 +347,7 @@ function deploy_node() {
     # 5. Wait until node is synced
     printf "\n\n<<< Waiting until node $node_index ($node_target_addr) is synced >>>\n\n"
 
-    WAIT_CMD="ssh $node_target_addr 'cd \$(find /home/${SEASON}/ain-blockchain* -maxdepth 0 -type d); . wait_until_node_sync.sh'"
+    WAIT_CMD="ssh $node_target_addr 'cd \$(find /home/${SEASON}/ain-blockchain* -maxdepth 0 -type d); . wait_until_node_sync.sh $node_url'"
     printf "\n\nWAIT_CMD=$WAIT_CMD\n\n"
     eval "echo ${node_login_pw} | sshpass -f <(printf '%s\n' ${node_login_pw}) ${WAIT_CMD}"
 }
diff --git a/wait_until_node_sync.sh b/wait_until_node_sync.sh
index c66c90fe1..582ccd4f8 100644
--- a/wait_until_node_sync.sh
+++ b/wait_until_node_sync.sh
@@ -1,7 +1,18 @@
 #!/bin/bash
 
+if [[ $# -lt 1 ]] || [[ $# -gt 1 ]]; then
+    printf "Usage: bash wait_until_node_sync.sh <Blockchain Node Url>\n"
+    printf "Example: bash wait_until_node_sync.sh http://123.456.789.1:8079\n"
+    printf "\n"
+    return 1
+fi
+
 printf "\n[[[[[ wait_until_node_sync.sh ]]]]]\n\n"
 
+# Parse options.
+NODE_URL="$1"
+printf "NODE_URL=$NODE_URL\n"
+
 printf "\n#### Wait until the new node server catches up ####\n\n"
 
 SECONDS=0
@@ -16,11 +27,11 @@ EOF
 
 while :
 do
-    healthCheck=$(curl -m 20 -X GET -H "Content-Type: application/json" "http://localhost:8080/health_check")
+    healthCheck=$(curl -m 20 -X GET -H "Content-Type: application/json" "${NODE_URL}/health_check")
     printf "\nhealthCheck = ${healthCheck}\n"
     if [[ "$healthCheck" = "true" ]]; then
         printf "\nBlockchain Node server is synced & running!\n"
-        lastBlockNumber=$(curl -m 20 -X GET -H "Content-Type: application/json" "http://localhost:8080/last_block_number" | jq -r '.result')
+        lastBlockNumber=$(curl -m 20 -X GET -H "Content-Type: application/json" "${NODE_URL}/last_block_number" | jq -r '.result')
         printf "\nlastBlockNumber = ${lastBlockNumber}\n"
         printf "\nTime it took to sync in seconds: $SECONDS\n"
         break