diff --git a/src/adUnit/VastAdUnit.js b/src/adUnit/VastAdUnit.js
index 08cb8b76..32f8ee9e 100644
--- a/src/adUnit/VastAdUnit.js
+++ b/src/adUnit/VastAdUnit.js
@@ -33,7 +33,10 @@ class VastAdUnit extends VideoAdUnit {
       case errorEvt: {
         this.error = data;
         this.errorCode = this.error && this.error.code ? this.error.code : 405;
-        this[_protected].onErrorCallbacks.forEach((callback) => callback(this.error));
+        this[_protected].onErrorCallbacks.forEach((callback) => callback(this.error, {
+          adUnit: this,
+          vastChain: this.vastChain
+        }));
         this[_protected].finish();
         break;
       }
diff --git a/src/adUnit/VideoAdUnit.js b/src/adUnit/VideoAdUnit.js
index 26a4504f..ca020e78 100644
--- a/src/adUnit/VideoAdUnit.js
+++ b/src/adUnit/VideoAdUnit.js
@@ -277,7 +277,7 @@ class VideoAdUnit extends Emitter {
    *
    * @throws if ad unit is finished.
    *
-   * @param {Function} callback - will be called on ad unit error passing the Error instance as the only argument if available.
+   * @param {Function} callback - will be called on ad unit error passing the Error instance  and an object with the adUnit and the  {@link VastChain}.
    */
   onError (callback) {
     if (typeof callback !== 'function') {
diff --git a/src/adUnit/VpaidAdUnit.js b/src/adUnit/VpaidAdUnit.js
index 9c568dc2..792ea0b9 100644
--- a/src/adUnit/VpaidAdUnit.js
+++ b/src/adUnit/VpaidAdUnit.js
@@ -119,7 +119,10 @@ class VpaidAdUnit extends VideoAdUnit {
         this.error = vpaidGeneralError(payload);
         this.errorCode = this.error.code;
 
-        this[_protected].onErrorCallbacks.forEach((callback) => callback(this.error));
+        this[_protected].onErrorCallbacks.forEach((callback) => callback(this.error, {
+          adUnit: this,
+          vastChain: this.vastChain
+        }));
 
         this[_protected].finish();
 
diff --git a/src/adUnit/__tests__/VastAdUnit.spec.js b/src/adUnit/__tests__/VastAdUnit.spec.js
index 940ce1d6..d159ba68 100644
--- a/src/adUnit/__tests__/VastAdUnit.spec.js
+++ b/src/adUnit/__tests__/VastAdUnit.spec.js
@@ -303,7 +303,10 @@ describe('VastAdUnit', () => {
       type: errorEvt
     });
     expect(onErrorCallback).toHaveBeenCalledTimes(1);
-    expect(onErrorCallback).toHaveBeenCalledWith(adUnit.error);
+    expect(onErrorCallback).toHaveBeenCalledWith(adUnit.error, {
+      adUnit,
+      vastChain
+    });
   });
 
   test('start must select a mediaFile and update the src and the assetUri', async () => {
@@ -492,7 +495,10 @@ describe('VastAdUnit', () => {
 
     videoElement.dispatchEvent(new Event('error'));
     expect(callback).toHaveBeenCalledTimes(1);
-    expect(callback).toHaveBeenCalledWith(mediaError);
+    expect(callback).toHaveBeenCalledWith(mediaError, {
+      adUnit,
+      vastChain
+    });
     expect(adUnit.error).toBe(mediaError);
     expect(adUnit.errorCode).toBe(405);
     expect(adUnit.isFinished()).toBe(true);
diff --git a/src/adUnit/__tests__/VpaidAdUnit.spec.js b/src/adUnit/__tests__/VpaidAdUnit.spec.js
index 176d61fb..b32a2bc4 100644
--- a/src/adUnit/__tests__/VpaidAdUnit.spec.js
+++ b/src/adUnit/__tests__/VpaidAdUnit.spec.js
@@ -693,7 +693,10 @@ describe('VpaidAdUnit', () => {
         } catch (error) {
           expect(error).toBe(handshakeVersionError);
           expect(callback).toHaveBeenCalledTimes(1);
-          expect(callback).toHaveBeenCalledWith(handshakeVersionError);
+          expect(callback).toHaveBeenCalledWith(handshakeVersionError, {
+            adUnit,
+            vastChain: adUnit.vastChain
+          });
         }
       });
 
@@ -709,10 +712,12 @@ describe('VpaidAdUnit', () => {
         adUnit.creativeAd.emit(adError);
 
         expect(callback).toHaveBeenCalledTimes(1);
-        expect(callback).toHaveBeenCalledWith(expect.any(Error));
         expect(callback).toHaveBeenCalledWith(expect.objectContaining({
           message: 'VPAID general error'
-        }));
+        }), {
+          adUnit,
+          vastChain: adUnit.vastChain
+        });
       });
     });
   });
diff --git a/src/runner/__tests__/runWaterfall.spec.js b/src/runner/__tests__/runWaterfall.spec.js
index 9a2ea73e..48ef6926 100644
--- a/src/runner/__tests__/runWaterfall.spec.js
+++ b/src/runner/__tests__/runWaterfall.spec.js
@@ -311,8 +311,16 @@ describe('runWaterfall', () => {
       await deferred.promise;
 
       expect(onError).toHaveBeenCalledTimes(3);
-      expect(onError).toHaveBeenCalledWith(runError);
-      expect(onError).toHaveBeenCalledWith(requestError);
+      expect(onError).toHaveBeenCalledWith(runError, {
+        adUnit: undefined,
+        vastChain: vastAdChain
+      });
+
+      expect(onError).toHaveBeenCalledWith(requestError, {
+        adUnit: undefined,
+        vastChain: undefined
+      });
+
       expect(requestAd).toHaveBeenCalledTimes(1);
       expect(requestAd).toHaveBeenCalledWith(adTag, expect.any(Object));
       expect(requestNextAd).toHaveBeenCalledTimes(2);
@@ -340,10 +348,16 @@ describe('runWaterfall', () => {
       const simulateAdUnitError = adUnit.onError.mock.calls[0][0];
       const mockError = new Error('mock error');
 
-      simulateAdUnitError(mockError);
+      simulateAdUnitError(mockError, {
+        adUnit,
+        vastChain: vastAdChain
+      });
 
       expect(onError).toHaveBeenCalledTimes(1);
-      expect(onError).toHaveBeenCalledWith(mockError);
+      expect(onError).toHaveBeenCalledWith(mockError, {
+        adUnit,
+        vastChain: adUnit.vastChain
+      });
     });
   });
 
diff --git a/src/runner/runWaterfall.js b/src/runner/runWaterfall.js
index c29dc040..d5c3972e 100644
--- a/src/runner/runWaterfall.js
+++ b/src/runner/runWaterfall.js
@@ -104,7 +104,10 @@ const waterfall = async (fetchVastChain, placeholder, options, isCanceled) => {
       });
     }
 
-    onError(error);
+    onError(error, {
+      adUnit,
+      vastChain
+    });
 
     if (vastChain && !isCanceled()) {
       if (runEpoch) {
@@ -143,7 +146,7 @@ const waterfall = async (fetchVastChain, placeholder, options, isCanceled) => {
  *  Defaults to `5`.
  * @param {runWaterfall~onAdReady} [options.onAdReady] - will be called once the ad is ready with the ad unit.
  * @param {runWaterfall~onAdStart} [options.onAdStart] - will be called once the ad starts with the ad unit.
- * @param {runWaterfall~onError} [options.onError] - will be called if there is an error with the video ad with the error instance.
+ * @param {runWaterfall~onError} [options.onError] - will be called if there is an error with the video ad with the error instance and an obj with the {@link VastChain} and the ad unit if it exists.
  * @param {runWaterfall~onRunFinish} [options.onRunFinish] - will be called whenever the ad run finishes.
  * @param {boolean} [options.viewability] - if true it will pause the ad whenever is not visible for the viewer.
  * Defaults to `false`
@@ -223,6 +226,9 @@ export default runWaterfall;
  *
  * @callback RunWaterfall~onError
  * @param {Error} error - the ad unit error.
+ * @param {Object} [data] - Data object that will contain:
+ * @param {VastChain} [data.vastChain] - The {@link VastChain} that caused the error.
+ * @param {VideoAdUnit} [data.adUnit] - Ad unit instance it can be a {@link VastAdUnit} or a {@link VpaidAdUnit}. Will only be added if the vastChain had an ad.
  */
 
 /**