I have this error in UE 5.5, it usually happens when I run it in the editor after I first open it. It also happens in the package. Just before the Mass Agents spawn, it hangs for about 2 seconds and I get this list of errors and then everything is fine.
I did a fresh file with just a cube in a character blueprint and I still get the error. Here are some screen grabs of my setup.
I used ChatGpt to help me pinpoint the issue, but I couldn’t find a solution that worked. It told me that the crash is coming from me adding the mass agent component in the character BP and adding the Fragment data set. It mentioned that since it was duplicating the fragments that it would cause this error.
When I remove it from the character, the error did go away, but none of the characters would link to the mass agents. so I would have a bunch of spawned meshes not moving around, even though If I hit apostrophe key the mass system was moving.
Not sure how to solve this. Anyone experience this and have a solution?
LogOutputDevice: Warning: Script Stack (0 frames) :
LogStats: FPlatformStackWalk::StackWalkAndDump - 0.035 s
LogOutputDevice: Error: === Handled ensure: ===
LogOutputDevice: Error: Ensure condition failed: InDescriptor.ChunkFragments.IsEmpty() [File:D:\build++UE5\Sync\Engine\Source\Runtime\MassEntity\Private\MassEntityManager.cpp] [Line: 1066]
LogOutputDevice: Error: Adding new chunk fragments is not supported
LogOutputDevice: Error: Stack:
LogOutputDevice: Error: [Callstack] 0x000001e2782e884d UnrealEditor-MassEntity.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x000001e278277e96 UnrealEditor-MassEntity.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffd41855e78 UnrealEditor-MassActors.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffd418511c9 UnrealEditor-MassActors.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x000001e278287534 UnrealEditor-MassEntity.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x000001e27829c41d UnrealEditor-MassEntity.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffdb18f9d06 UnrealEditor-Engine.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffdd0ce2722 UnrealEditor-Core.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffdd0cd7d4a UnrealEditor-Core.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffdd0cd81ee UnrealEditor-Core.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffdd0ce59aa UnrealEditor-Core.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffdb1954ea4 UnrealEditor-Engine.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffdb196493d UnrealEditor-Engine.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffdb092cf5f UnrealEditor-Engine.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffdb09359ec UnrealEditor-Engine.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffdad774b78 UnrealEditor-UnrealEd.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffdae4042c6 UnrealEditor-UnrealEd.dll!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ff6499d6b47 UnrealEditor.exe!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ff6499f57ac UnrealEditor.exe!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ff6499f589a UnrealEditor.exe!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ff6499f9114 UnrealEditor.exe!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ff649a0bd04 UnrealEditor.exe!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ff649a0f0ba UnrealEditor.exe!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffe3d92e8d7 KERNEL32.DLL!UnknownFunction
LogOutputDevice: Error: [Callstack] 0x00007ffe3fa48d9c ntdll.dll!UnknownFunction
LogStats: SubmitErrorReport - 0.000 s
LogStats: SendNewReport - 1.198 s
LogStats: FDebug::EnsureFailed - 1.235 s