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Lightmass Crashed upon build

Hello, i am finishing a proyect and i made a final production build and everything was ok, after introduce two more objects, (few poligons and correct lighmaps) i tried a new final production build and it crashed every time. i can`t find any post related, please.

=== Lightmass crashed: ===Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xffffffff Fatal error: [File:D:\Build\++UE4+Release-4.18+Compile\Sync\Engine\Source\Programs\UnrealLightmass\Private\Lighting\LightingSystem.cpp] [Line: 1338] Static lighting thread exception: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xffffffff

0x0000000097C785A2 embree.dll!UnknownFunction [] 0x00000000977A95F0 embree.dll!UnknownFunction [] 0x000000003F9694EC UnrealLightmass.exe!UnknownFunction [] 0x000000003F937B47 UnrealLightmass.exe!UnknownFunction [] 0x000000003F9CD12A UnrealLightmass.exe!UnknownFunction [] 0x000000003F9AA25C UnrealLightmass.exe!UnknownFunction [] 0x000000003F9CFE76 UnrealLightmass.exe!UnknownFunction [] 0x000000003F98E9CB UnrealLightmass.exe!UnknownFunction [] 0x000000003F982D29 UnrealLightmass.exe!UnknownFunction [] 0x0000000097186F0C UnrealLightmass-Core.dll!UnknownFunction [] 0x0000000097177AD3 UnrealLightmass-Core.dll!UnknownFunction [] 0x00000000771959CD kernel32.dll!UnknownFunction [] 0x00000000772CA561 ntdll.dll!UnknownFunction [] 0x00000000772CA561 ntdll.dll!UnknownFunction []

Sorry for my english

Product Version: UE 4.18
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asked Nov 08 '17 at 03:24 PM in Rendering

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la fiera
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avatar image LeFxGuy Nov 08 '17 at 04:43 PM

Select all objects and move them in one direction and then move them back. (Don't use undo) It can happen that your lightmass cache got corrupted and this way, you are invalidating all the data, so that everything is without lightmap. Maybe this helps

avatar image la fiera Nov 09 '17 at 07:34 PM

Thank tou i will try this later and let you know

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I was having the same issue and moved my game objects and scaled the Light Mass volume to a larger sized. After re-building the lighting, it no longer had an error.

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answered Feb 09 '19 at 11:41 PM

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