Editor-Crash on start, log and error stack not pointing to my project

Community Community & Industry Discussion
1

Hello, actually my **editor is crashing when loading my project **very often. Not everytime, but often.

How do I debug this, when the error is pointing to UE4 Source (but I use “non-modified” Launcher Editor Version)?

Crash Report:



LoginId: xxxx
EpicAccountId: xxxx

Assertion failed: IsExport() [File:D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\CoreUObject\Public\UObject/ObjectResource.h] [Line: 67]

UE4Editor_Core
UE4Editor_Core
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_CoreUObject
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor
UE4Editor
UE4Editor
UE4Editor
kernel32
ntdll

Log:


[2020.07.13-10.54.08:259] 0]LightingResults: New page: Lighting Build
[2020.07.13-10.54.08:263] 0]LogWorld: UWorld::CleanupWorld for Untitled, bSessionEnded=true, bCleanupResources=true
[2020.07.13-10.54.08:264] 0]LogSlate: InvalidateAllWidgets triggered. All widgets were invalidated
[2020.07.13-10.54.08:264] 0]MapCheck: New page: Map Check
[2020.07.13-10.54.08:265] 0]LightingResults: New page: Lighting Build
[2020.07.13-10.54.08:283] 0]LogAISub: UAISubsystem::~UAISubsystem EnvQueryManager (0000020FBD255600), frame # 0
[2020.07.13-10.54.08:283] 0]LogAISub: UAISubsystem::~UAISubsystem AIPerceptionSystem (0000020FBD299300), frame # 0
[2020.07.13-10.54.08:285] 0]LogUObjectHash: Compacting FUObjectHashTables data took 0.93ms
[2020.07.13-10.54.08:542] 0]LogOutputDevice: Warning:

Script Stack (0 frames):

[2020.07.13-10.54.08:542] 0]LogWindows: Windows GetLastError: The operation completed successfully. (0)
[2020.07.13-10.54.11:582] 0]LogWindows: Error: === Critical error: ===
[2020.07.13-10.54.11:582] 0]LogWindows: Error:
[2020.07.13-10.54.11:582] 0]LogWindows: Error: Assertion failed: IsExport() [File:D:\Build\++UE4+Licensee\Sync\Engine\Source\Runtime\CoreUObject\Public\UObject/ObjectResource.h] [Line: 67]
[2020.07.13-10.54.11:582] 0]LogWindows: Error:
[2020.07.13-10.54.11:582] 0]LogWindows: Error:
[2020.07.13-10.54.11:582] 0]LogWindows: Error:
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaf6cda799 KERNELBASE.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffa9939eb46 UE4Editor-Core.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffa993a1f28 UE4Editor-Core.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffa9912e53d UE4Editor-Core.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffa990b97b5 UE4Editor-Core.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffa990bbaf0 UE4Editor-Core.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa168c565 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa1677388 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa1650837 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa18536c4 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa18215d7 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa184877a UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa182003c UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa1821acb UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa18498b0 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa198d352 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa188cdcd UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa188b4b3 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa188d001 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa188b4b3 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa188ad73 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa182fba0 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa1888f3f UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa1823c11 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa183c90e UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa198cfe0 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa188cdcd UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa188b4b3 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa188d001 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa188b4b3 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa188ad73 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa182fba0 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa1888f3f UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa1823c11 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa183c90e UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa198cfe0 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa188cdcd UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa188b4b3 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa188d001 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa188b4b3 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa188ad73 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa182fba0 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa1888f3f UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa1823c11 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:582] 0]LogWindows: Error: [Callstack] 0x00007ffaa183c90e UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffaa198cfe0 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffaa188cdcd UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffaa188b4b3 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffaa188d001 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffaa188b4b3 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffaa188ad73 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffaa182fba0 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffaa1888f3f UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffaa1823c11 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffaa183c90e UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffaa198cfe0 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffaa198c420 UE4Editor-CoreUObject.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffa9476676e UE4Editor-UnrealEd.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffa94755b3f UE4Editor-UnrealEd.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffa9473dda1 UE4Editor-UnrealEd.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffa94f76977 UE4Editor-UnrealEd.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffa94ab1002 UE4Editor-UnrealEd.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffa94ab0e04 UE4Editor-UnrealEd.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffa94fb1266 UE4Editor-UnrealEd.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffa94f72a13 UE4Editor-UnrealEd.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ff6bb28b8fb UE4Editor.exe!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ff6bb28bb5a UE4Editor.exe!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ff6bb29e31d UE4Editor.exe!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ff6bb2a145a UE4Editor.exe!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffaf7da7bd4 KERNEL32.DLL!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error: [Callstack] 0x00007ffaf9d4ce51 ntdll.dll!UnknownFunction ]
[2020.07.13-10.54.11:583] 0]LogWindows: Error:
[2020.07.13-10.54.11:596] 0]LogExit: Executing StaticShutdownAfterError
[2020.07.13-10.54.11:599] 0]LogWindows: FPlatformMisc::RequestExit(1)
[2020.07.13-10.54.11:599] 0]LogCore: Engine exit requested (reason: Win RequestExit)
[2020.07.13-10.54.11:610] 0]Log file closed, 07/13/20 12:54:11

Infos:

  • If Editor starts, Game runs fine. Also cooked game runs fine.
  • Using 4.25 Laucher Editor Version without ue4 source modifications
  • Windows
  • I can give you more info if needed

Any idea why this could happen and how I can “debug” this or extend the Error message so I can see what of my code/bp/object is forcing this error?

Thanks a lot
Flow

2

The ue4 class which is mentioned in the error is here:
https://github.com/EpicGames/UnrealEngine/blob/release/Engine/Source/Runtime/CoreUObject/Public/CoreUObject.h

But line 67 which is written in the error message, is a simple line with an include. I baldy need an advice how and why this can lead to my crashes with Launcher UE4 Version. :frowning: