Illegal Index for Widget Blueprint

Hello all

I have a problem with the widget blueprint.
If i play it in the editor all went fine, but when i want to pack the build i get the following error back:

Windows:Error: === Critical error: ===
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2016.11.20-14.16.05:704][  0]LogWindows:Error: 
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2016.11.20-14.16.05:704][  0]LogWindows:Error: Assertion failed: !DependencyIndex.IsNull() [File:D:\Build\++UE4+Release-4.13+Compile\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\SavePackage.cpp] [Line: 4366] 
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2016.11.20-14.16.05:704][  0]LogWindows:Error: Failed to find dependency index for WidgetBlueprintGeneratedClass /Game/GUI/eventWidget.eventWidget_C (ObjectProperty /Game/Levels/course.course_C:eventWidget)
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2016.11.20-14.16.05:705][  0]LogWindows:Error:

Hello NYAHGFX,

I have a few questions for you that will help narrow down what issue it is that you are experiencing.

Quick questions:

  1. Can you reproduce this issue in a clean project?
  2. If so, could you provide a detailed list of steps to reproduce this issue on our end?
  3. Could you provide screen shots of any blueprints/widgets/settings that may be involved with this issue?

Hello NYAHGFX,

We have not heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you are still experiencing the issue you reported, please respond to this message with additional information and we will follow up.

Thanks,