error messages improved

Unity_HoloLens_Client/Assets/Scripts/Piano/Piano.cs

@@ -104,9 +104,8 @@ public class Piano : MonoBehaviour
         }
         catch (Exception e)
         {
-            Debug.LogError(e.Message);
             Debug.LogError("An Exception in this code could have been caused by an old properties File," +
-                           "try going into the Adjustment Menu Object and resetting the Properties File using the provided Editor Button");
+                           "try going into the Adjustment Menu Object and resetting the Properties File using the provided Editor Button\n" + e.Message + "\n" + e.StackTrace);
         }
     }
 
@@ -134,6 +133,13 @@ public class Piano : MonoBehaviour
             midiIndex < Layout.MidiKeyIndexStart + Layout.KeyAmount;
             midiIndex++)
         {
+            var key = Keys[midiIndex];
+            if (!key)
+            {
+                Debug.LogError("The piano keys have not been instantiated correctly!");
+                return;
+            }
+            
             var keyTransform = Keys[midiIndex].transform;
 
             if (PianoLayout.IsBlackKey(midiIndex))