How to fix unknown cook failure - S_LightError

Development Rendering
1

Hi there,

I’ve had unknown cook failures before. I can usually fix them by deleting save, intermediate and config folder or by fixing a broken blueprint. In this instance I haven’t had any luck. The log file hints at S_LightError but I’m not sure what this means and haven’t been unable to find my own answers. Any help would be greatly appreciated.

Thanks,

Please see attached [LogFile][1]

125948-cook-2017.02.12-21.45.07.txt (1.83 MB)

2

I didn’t figure out what the problem was but I just rolled back to a previous working backup and migrated assets over from the broken one so I’m up and running again. If anyone does know the answer though it may assist others in future.

3

Clintmcc,

It looks like you’re having an animation sequence issue:

[2017.02.12-10.44.27:621][  0]LogOutputDevice:Warning: === Handled error: ===

Ensure condition failed: !bUseRawDataOnly [File:D:\Build\++UE4+Release-4.12+Compile\Sync\Engine\Source\Runtime\Engine\Private\Animation\AnimSequence.cpp] [Line: 325]

Stack: 
UE4Editor-Core.dll
UE4Editor-Core.dll
UE4Editor-Core.dll
UE4Editor-Engine.dll
UE4Editor-CoreUObject.dll
UE4Editor-CoreUObject.dll
UE4Editor-UnrealEd.dll
UE4Editor-UnrealEd.dll
UE4Editor-UnrealEd.dll
UE4Editor-UnrealEd.dll
UE4Editor-UnrealEd.dll
UE4Editor-Cmd.exe
UE4Editor-Cmd.exe
UE4Editor-Cmd.exe
UE4Editor-Cmd.exe
UE4Editor-Cmd.exe
KERNEL32.DLL
ntdll.dll
ntdll.dll

[2017.02.12-10.44.27:621][  0]LogOutputDevice:Error: 
end: stack for UAT