Widget Fatal Error - Happens during Packaging and after Opening the Project

Hello everyone,

in my Project (Blueprints only) i want to use widgets. I created 3 different from the widget blueprint in the user interface section. I added content and animations.

In the first time of creating these things without closing the unrael engine, everything is working fine in the editor viewport.
However
, if i want to package the project or i reopen the project in the unreal engine, every time i get fatal errors.

In the widget i have to change (adding a variable, text, button or anything else) and everything appears and can be compiled, however thats no solution because the problems from above in launching and packaging still happen.

Here are the Errors from the OutputLog:

  • LogBlueprint: Warning: [Compiler BP_Origin_Widget_appearing_AreaNaming] Get : ‘Fade’ variable not found. Base class was probably changed. /Game/Blueprints/Interaction/Text/BP_Origin_Widget_appearing_AreaNaming.BP_Origin_Widget_appearing_AreaNaming

  • Make sure ‘BP_Origin_Widget_appearing_AreaNaming_C’ has been compiled for Get Fade

  • LogBlueprint: Error: [Compiler BP_Origin_Widget_appearing_AreaNaming] The property associated with Fade could not be found

  • LogOutputDevice: Error: === Handled ensure: ===
    LogOutputDevice: Error: Ensure condition failed: false [File:D:\Build++UE4+Release-4.19+Compile\Sync\Engine\Source\Editor\UnrealEd\Private\Kismet2\KismetDebugUtilities.cpp] [Line: 1108]
    LogOutputDevice: Error: Error: Invalid (but non-null) property associated with pin; cannot get variable value
    LogOutputDevice: Error: Stack:
    LogOutputDevice: Error: [Callstack] 0x000000007D42B706 UE4Editor-Core.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x000000007D18AE3A UE4Editor-Core.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x000000007D19ECD6 UE4Editor-Core.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x0000000075073DF6 UE4Editor-UnrealEd.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x000000006AECB2A8 UE4Editor-BlueprintGraph.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x0000000069F4C22A UE4Editor-GraphEditor.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x0000000069DD77AC UE4Editor-GraphEditor.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x0000000069DDAEC9 UE4Editor-GraphEditor.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x0000000069F16E65 UE4Editor-GraphEditor.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x0000000076FB6057 UE4Editor-Slate.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x0000000076FBBB51 UE4Editor-Slate.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x00000000771EC253 UE4Editor-Slate.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x0000000077010475 UE4Editor-Slate.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x0000000076FE8360 UE4Editor-Slate.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x0000000076FDB197 UE4Editor-Slate.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x0000000089B7E4EE UE4Editor-ApplicationCore.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x0000000089B71B78 UE4Editor-ApplicationCore.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x0000000089B8052C UE4Editor-ApplicationCore.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x0000000089B6D679 UE4Editor-ApplicationCore.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x00000000A8556CC1 USER32.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x00000000A8556693 USER32.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x0000000089B81666 UE4Editor-ApplicationCore.dll!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x0000000055835475 UE4Editor.exe!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x0000000055846BD0 UE4Editor.exe!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x0000000055846C4A UE4Editor.exe!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x0000000055854177 UE4Editor.exe!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x0000000055855B87 UE4Editor.exe!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x00000000A93F3034 KERNEL32.DLL!UnknownFunction []
    LogOutputDevice: Error: [Callstack] 0x00000000A9541431 ntdll.dll!UnknownFunction []
    LogUObjectArray: Warning: Invalid object index -572662307

Here are some Pictures from one Widget:

Here is the Designer, the Fade Animation is shown correctly also in the animation graph

Here you see the Graph and the missing fade as well the image

After changing something (here i added a variable but not compiled yet), everything shows up again

Thats how i add the Widget to the Viewport:

The Base class of the widgets have not be changed and the Data shows up in the explorer in the correct place with the correct name. Creating a new Widget will cause the same errors and I also tried to migrate the complete project into a new one but the problem was the same.

I could eliminate the possibility of producing these errors from other blueprint. After i disconnected the widgets from the Blueprints to avoid running them i could package the game without any problems.
Does someone knows this kind of Problem? Is there some solution or do i have to do this project without widgets?

  • I have also added a clean Widget Blueprint without any changes, here are the Errors of this situation:
  • Windows (64-bit)): LogWindows: Error: begin: stack for UAT
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: === Critical error: ===
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error:
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: Fatal error!
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error:
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000010
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error:
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x0000000077B6F1C6 UE4Editor-CoreUObject.dll!UnknownFunction []
    PackagingResults: Error: begin: stack for UAT
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x000000006C3EB38E UE4Editor-UMG.dll!UnknownFunction []
    PackagingResults: Error: === Critical error: ===
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x000000006C3EB2C1 UE4Editor-UMG.dll!UnknownFunction []
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x000000006C38351D UE4Editor-UMG.dll!UnknownFunction []
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x000000006C3A8B9A UE4Editor-UMG.dll!UnknownFunction []
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x0000000077B5BDE7 UE4Editor-CoreUObject.dll!UnknownFunction []
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x0000000077B44540 UE4Editor-CoreUObject.dll!UnknownFunction []
    PackagingResults: Error: Fatal error!
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x0000000074C35264 UE4Editor-UnrealEd.dll!UnknownFunction []
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x0000000074ADEEEB UE4Editor-UnrealEd.dll!UnknownFunction []
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x0000000074AE022D UE4Editor-UnrealEd.dll!UnknownFunction []
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x0000000074AEBC59 UE4Editor-UnrealEd.dll!UnknownFunction []
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x000000007499A580 UE4Editor-UnrealEd.dll!UnknownFunction []
    PackagingResults: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000010
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00000000749C1CB0 UE4Editor-UnrealEd.dll!UnknownFunction []
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x000000003A95EB20 UE4Editor-Cmd.exe!UnknownFunction []
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x000000003A9569FA UE4Editor-Cmd.exe!UnknownFunction []
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x000000003A956C4A UE4Editor-Cmd.exe!UnknownFunction []
    PackagingResults: Error: [Callstack] 0x0000000077B6F1C6 UE4Editor-CoreUObject.dll!UnknownFunction []
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x000000003A964177 UE4Editor-Cmd.exe!UnknownFunction []
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x000000003A964FBF UE4Editor-Cmd.exe!UnknownFunction []
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00000000A93F3034 KERNEL32.DLL!UnknownFunction []
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00000000A9541431 ntdll.dll!UnknownFunction []
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: [Callstack] 0x00000000A9541431 ntdll.dll!UnknownFunction []
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error:
    UATHelper: Packaging (Windows (64-bit)): LogWindows: Error: end: stack for UAT
    PackagingResults: Error: [Callstack] 0x000000006C3EB38E UE4Editor-UMG.dll!UnknownFunction []
    PackagingResults: Error: [Callstack] 0x000000006C3EB2C1 UE4Editor-UMG.dll!UnknownFunction []
    PackagingResults: Error: [Callstack] 0x000000006C38351D UE4Editor-UMG.dll!UnknownFunction []
    PackagingResults: Error: [Callstack] 0x000000006C3A8B9A UE4Editor-UMG.dll!UnknownFunction []
    PackagingResults: Error: [Callstack] 0x0000000077B5BDE7 UE4Editor-CoreUObject.dll!UnknownFunction []
    PackagingResults: Error: [Callstack] 0x0000000077B44540 UE4Editor-CoreUObject.dll!UnknownFunction []
    PackagingResults: Error: [Callstack] 0x0000000074C35264 UE4Editor-UnrealEd.dll!UnknownFunction []
    PackagingResults: Error: [Callstack] 0x0000000074ADEEEB UE4Editor-UnrealEd.dll!UnknownFunction []
    PackagingResults: Error: [Callstack] 0x0000000074AE022D UE4Editor-UnrealEd.dll!UnknownFunction []
    PackagingResults: Error: [Callstack] 0x0000000074AEBC59 UE4Editor-UnrealEd.dll!UnknownFunction []
    PackagingResults: Error: [Callstack] 0x000000007499A580 UE4Editor-UnrealEd.dll!UnknownFunction []
    PackagingResults: Error: [Callstack] 0x00000000749C1CB0 UE4Editor-UnrealEd.dll!UnknownFunction []
    PackagingResults: Error: [Callstack] 0x000000003A95EB20 UE4Editor-Cmd.exe!UnknownFunction []
    PackagingResults: Error: [Callstack] 0x000000003A9569FA UE4Editor-Cmd.exe!UnknownFunction []
    PackagingResults: Error: [Callstack] 0x000000003A956C4A UE4Editor-Cmd.exe!UnknownFunction []
    PackagingResults: Error: [Callstack] 0x000000003A964177 UE4Editor-Cmd.exe!UnknownFunction []
    PackagingResults: Error: [Callstack] 0x000000003A964FBF UE4Editor-Cmd.exe!UnknownFunction []
    PackagingResults: Error: [Callstack] 0x00000000A93F3034 KERNEL32.DLL!UnknownFunction []
    PackagingResults: Error: [Callstack] 0x00000000A9541431 ntdll.dll!UnknownFunction []
    PackagingResults: Error: [Callstack] 0x00000000A9541431 ntdll.dll!UnknownFunction []
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMultiByProfile.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMultiForObjects.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceSingle.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceSingleByProfile.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceSingleForObjects.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:CapsuleTraceMulti.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:CapsuleTraceMultiByProfile.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:CapsuleTraceMultiForObjects.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:CapsuleTraceSingle.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:CapsuleTraceSingleByProfile.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:CapsuleTraceSingleForObjects.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:DrawDebugCylinder.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:LineTraceMulti.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:LineTraceMultiByProfile.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:LineTraceMultiForObjects.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:LineTraceSingle.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:LineTraceSingleByProfile.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:LineTraceSingleForObjects.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:SphereTraceMulti.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:SphereTraceMultiByProfile.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:SphereTraceMultiForObjects.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:SphereTraceSingle.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:SphereTraceSingleByProfile.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.KismetSystemLibrary:SphereTraceSingleForObjects.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or BoolProperty /Script/Landscape.LandscapeSplineConnection:End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/Engine.BatchedLine:End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/AIModule.NavLocalGridManager:FindLocalNavigationGridPath.End
    LogUObjectHash: Warning: Ambiguous search, could be StructProperty /Script/Engine.KismetSystemLibrary:BoxTraceMulti.End or StructProperty /Script/FunctionalTesting.FunctionalTestUtilityLibrary:TraceChannelTestUtil.End
    PackagingResults: Error: end: stack for UAT
    UATHelper: Packaging (Windows (64-bit)): Took 25,8191315s to run UE4Editor-Cmd.exe, ExitCode=3
    UATHelper: Packaging (Windows (64-bit)): ERROR: Cook failed.

Iam greatful for any help.