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How to fix unknown cook failure - S_LightError

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

Product Version: UE 4.12
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asked Feb 12 '17 at 11:19 AM in Packaging & Deployment

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Clintmcc
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avatar image Clintmcc Feb 14 '17 at 10:03 PM

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.

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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
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answered Feb 15 '17 at 06:56 PM

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