Unknown cook failure (kismet compiler)

[Arremer]

Every time I try to cook the project I get this bunch of errors(red) and later on the cook fails with unknown failure.

I fixed every other error/warning I could track down and this is the only bunch that still persists,no matter what cook settings I try.

Full log here

This is the problematic part :

MapCheck: New page: Map Check
LightingResults: New page: Lighting Build
LogStats: FPlatformStackWalk::StackWalkAndDump -  0.406 s
LogOutputDevice:Error: === Handled ensure: ===
LogOutputDevice:Error: Ensure condition failed: DestinationExpression->AssociatedVarProperty [File:D:\Build\++UE4+Release-4.15+Compile\Sync\Engine\Source\Editor\KismetCompiler\Private\KismetCompilerVMBackend.cpp] [Line: 1321]
LogOutputDevice:Error: Stack: 
LogOutputDevice:Error: UE4Editor-Core.dll!0x00000000020F95E6
LogOutputDevice:Error: UE4Editor-Core.dll!0x0000000001EA9B82
LogOutputDevice:Error: UE4Editor-Core.dll!0x0000000001EBB666
LogOutputDevice:Error: UE4Editor-KismetCompiler.dll!0x00000000F25227C0
LogOutputDevice:Error: UE4Editor-KismetCompiler.dll!0x00000000F2521171
LogOutputDevice:Error: UE4Editor-KismetCompiler.dll!0x00000000F25377A7
LogOutputDevice:Error: UE4Editor-KismetCompiler.dll!0x00000000F25116F7
LogOutputDevice:Error: UE4Editor-KismetCompiler.dll!0x00000000F2537B26
LogOutputDevice:Error: UE4Editor-KismetCompiler.dll!0x00000000F250986F
LogOutputDevice:Error: UE4Editor-KismetCompiler.dll!0x00000000F250C2C6
LogOutputDevice:Error: UE4Editor-KismetCompiler.dll!0x00000000F250B94D
LogOutputDevice:Error: UE4Editor-UnrealEd.dll!0x0000000000376AD9
LogOutputDevice:Error: UE4Editor-UnrealEd.dll!0x0000000000338A1A
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000026C0C37
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x000000000269B086
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x000000000279E5DA
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x000000000277868E
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002792C11
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002777709
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002792C11
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002777709
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002778ACB
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027951B6
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002874D72
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002874327
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027C0CB4
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BF9E5
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027C0F05
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BF9E5
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027C0F05
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BF9E5
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BF828
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027822EA
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BEA45
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x000000000277AB6B
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002790B64
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002874B2C
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002874327
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027C0CB4
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BF9E5
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027C0F05
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BF9E5
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BF828
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027822EA
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BEA45
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x000000000277AB6B
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002790B64
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002874B2C
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002874327
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027C0CB4
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BF9E5
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027C0F05
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BF9E5
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BF828
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027822EA
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BEA45
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x000000000277AB6B
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002790B64
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002874B2C
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002874327
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027C0CB4
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BF9E5
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027C0F05
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BF9E5
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BF828
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027822EA
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BEA45
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x000000000277AB6B
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002790B64
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002874B2C
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002874327
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027C0CB4
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BF9E5
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027C0F05
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BF9E5
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027C0F05
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BF9E5
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BF828
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027822EA
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000027BEA45
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x000000000277AB6B
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002790B64
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x0000000002874B2C
LogOutputDevice:Error: UE4Editor-CoreUObject.dll!0x00000000028742B7
LogOutputDevice:Error: UE4Editor-UnrealEd.dll!0x0000000000032D37
LogOutputDevice:Error: UE4Editor-UnrealEd.dll!0x0000000000023A25
LogOutputDevice:Error: UE4Editor-UnrealEd.dll!0x00000000000093F3
LogOutputDevice:Error: UE4Editor-UnrealEd.dll!0x00000000007FAA15
LogOutputDevice:Error: UE4Editor-UnrealEd.dll!0x0000000000299BCB
LogOutputDevice:Error: UE4Editor-UnrealEd.dll!0x0000000000299816
LogOutputDevice:Error: UE4Editor-UnrealEd.dll!0x00000000007AD0FE
LogOutputDevice:Error: UE4Editor-UnrealEd.dll!0x0000000000770A4D
LogOutputDevice:Error: UE4Editor.exe!0x00000000CF96EA36
LogOutputDevice:Error: UE4Editor.exe!0x00000000CF96EBBA
LogOutputDevice:Error: UE4Editor.exe!0x00000000CF980A29
LogOutputDevice:Error: UE4Editor.exe!0x00000000CF9822B6
LogOutputDevice:Error: KERNEL32.DLL!0x000000002C2D2774
LogOutputDevice:Error: ntdll.dll!0x000000002EBF0D61
LogStats:                SubmitErrorReport -  0.000 s
LogStats:                    SendNewReport -  0.367 s
LogStats:             FDebug::EnsureFailed -  0.782 s
LogAIModule: Creating AISystem for world TestRoom
LogEditorServer: Finished looking for orphan Actors (0.000 secs)
Cmd: MAP CHECKDEP NOCLEARLOG

[Sean_L]

Hey Arremer,

I found a few threads where users hit a similar, if not the same, ensure and were able to discover the offending nodes:

Blueprint Integer Selection with increment afterwards cause Ensure condition...

How can I narrow down the cause of this "=== Handled error: ===" in my pawn...

Those should get you on the right track to start debugging and resolve this error.

Have a great day

[Arremer]

Based on this I started testing places where “incrementint” and “select” nodes are connected closely. Soon I found the problematic “incrementint” node.

The node is simple and looks completely fine but somehow cooker doesnt like it. Now i have “branch” node instead of “select” node and it cooks fine.

The weird part is that those bunch of errors is still present.
Thanks.