diff --git a/src/dash/DashAdapter.js b/src/dash/DashAdapter.js
index 35ccb88ce0..83e11b5f0f 100644
--- a/src/dash/DashAdapter.js
+++ b/src/dash/DashAdapter.js
@@ -66,7 +66,7 @@ function DashAdapter() {
     }
 
     function getAdaptationForMediaInfo(mediaInfo) {
-        if (!adaptations) return null;
+        if (!adaptations || !mediaInfo || !adaptations[mediaInfo.streamInfo.id]) return null;
         return adaptations[mediaInfo.streamInfo.id][mediaInfo.index];
     }
 
diff --git a/src/dash/DashMetrics.js b/src/dash/DashMetrics.js
index 0bc2b8a1de..2e73965ad6 100644
--- a/src/dash/DashMetrics.js
+++ b/src/dash/DashMetrics.js
@@ -341,17 +341,19 @@ function DashMetrics() {
             adaptationSetArrayIndex,
             representationArrayIndex;
 
-        adaptationSetArray = period.AdaptationSet_asArray;
-        for (adaptationSetArrayIndex = 0; adaptationSetArrayIndex < adaptationSetArray.length; adaptationSetArrayIndex = adaptationSetArrayIndex + 1) {
-            adaptationSet = adaptationSetArray[adaptationSetArrayIndex];
-            representationArray = adaptationSet.Representation_asArray;
-            for (representationArrayIndex = 0; representationArrayIndex < representationArray.length; representationArrayIndex = representationArrayIndex + 1) {
-                representation = representationArray[representationArrayIndex];
-                if (representationId === representation.id) {
-                    if (returnIndex) {
-                        return representationArrayIndex;
-                    } else {
-                        return representation;
+        if (period) {
+            adaptationSetArray = period.AdaptationSet_asArray;
+            for (adaptationSetArrayIndex = 0; adaptationSetArrayIndex < adaptationSetArray.length; adaptationSetArrayIndex = adaptationSetArrayIndex + 1) {
+                adaptationSet = adaptationSetArray[adaptationSetArrayIndex];
+                representationArray = adaptationSet.Representation_asArray;
+                for (representationArrayIndex = 0; representationArrayIndex < representationArray.length; representationArrayIndex = representationArrayIndex + 1) {
+                    representation = representationArray[representationArrayIndex];
+                    if (representationId === representation.id) {
+                        if (returnIndex) {
+                            return representationArrayIndex;
+                        } else {
+                            return representation;
+                        }
                     }
                 }
             }
diff --git a/src/dash/models/DashManifestModel.js b/src/dash/models/DashManifestModel.js
index 826908d6c6..f0c80d90f1 100644
--- a/src/dash/models/DashManifestModel.js
+++ b/src/dash/models/DashManifestModel.js
@@ -729,6 +729,7 @@ function DashManifestModel() {
     }
 
     function getEventStreamForAdaptationSet(manifest, adaptation) {
+        if (!adaptation || !manifest) return [];
         var inbandStreams = manifest.Period_asArray[adaptation.period.index].
             AdaptationSet_asArray[adaptation.index].InbandEventStream_asArray;