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[4.8p2] Crash on Building Lightmass

Hi,

I'm running into an issue building the lighting for my level in 4.8 where it used to work perfectly in 4.7. I'm using the latest source release of 4.8 preview 2. I've attached the complete log but here is the relevant stack right at the end before it crashes:

 [2015.05.14-23.36.45:905][981]LogMaterial: Missing cached shader map for material FLightmassMaterialRenderer MaterialInstanceDynamic_82, compiling. 
 [2015.05.14-23.36.45:920][982]LogMaterial: Missing cached shader map for material FLightmassMaterialRenderer MaterialInstanceDynamic_83, compiling. 
 [2015.05.14-23.36.45:923][982]LogMaterial: Missing cached shader map for material FLightmassMaterialRenderer MaterialInstanceDynamic_84, compiling. 
 [2015.05.14-23.36.45:925][982]LogMaterial: Missing cached shader map for material FLightmassMaterialRenderer MaterialInstanceDynamic_85, compiling. 
 [2015.05.14-23.36.48:033][ 25]=== Lightmass crashed: ===
 Assertion failed: CurrentMaterialElement.Material [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.8\Engine\Source\Programs\UnrealLightmass\Private\Lighting\LightingMesh.cpp] [Line: 127] 
 Failed to import material with GUID E4309DF94AEEDFB691EEA68C59C351D0
 
 
 KERNELBASE.dll {0x00007ffcf3eb8b9c} + 0 bytes
 UnrealLightmass-Core.dll {0x00007ffca5ebd66f} + 0 bytes
 UnrealLightmass-Core.dll {0x00007ffca5d9ff88} + 0 bytes
 UnrealLightmass-Core.dll {0x00007ffca5d81708} + 0 bytes
 UnrealLightmass.exe {0x00007ff67e0a7cd6} + 0 bytes
 UnrealLightmass.exe {0x00007ff67e11257a} + 0 bytes
 UnrealLightmass.exe {0x00007ff67e040d03} + 0 bytes
 UnrealLightmass.exe {0x00007ff67e0a6552} + 0 bytes
 UnrealLightmass.exe {0x00007ff67e0a8270} + 0 bytes
 UnrealLightmass.exe {0x00007ff67e07293f} + 0 bytes
 UnrealLightmass.exe {0x00007ff67e0af358} + 0 bytes
 UnrealLightmass.exe {0x00007ff67e0cd8ef} + 0 bytes
 UnrealLightmass.exe {0x00007ff67e12949b} + 0 bytes
 KERNEL32.DLL {0x00007ffcf42613d2} + 0 bytes
 ntdll.dll {0x00007ffcf6bf5444} + 0 bytes
 ntdll.dll {0x00007ffcf6bf5444} + 0 bytes
 
 [2015.05.14-23.36.48:033][ 25]*** CRITICAL ERROR! Machine: machinename
 [2015.05.14-23.36.48:033][ 25]*** CRITICAL ERROR! Logfile: UnrealLight_machinename_46CF90494B0EF17CE31AC78C1145C38B.log
 [2015.05.14-23.36.48:033][ 25]*** CRITICAL ERROR! Crash report: 
 [2015.05.14-23.36.48:033][ 25]LightingResults:Error: Error <None> === Lightmass crashed: ===
 Assertion failed: CurrentMaterialElement.Material [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.8\Engine\Source\Programs\UnrealLightmass\Private\Lighting\LightingMesh.cpp] [Line: 127] 
 Failed to import material with GUID E4309DF94AEEDFB691EEA68C59C351D0
 
 
 KERNELBASE.dll {0x00007ffcf3eb8b9c} + 0 bytes
 UnrealLightmass-Core.dll {0x00007ffca5ebd66f} + 0 bytes
 UnrealLightmass-Core.dll {0x00007ffca5d9ff88} + 0 bytes
 UnrealLightmass-Core.dll {0x00007ffca5d81708} + 0 bytes
 UnrealLightmass.exe {0x00007ff67e0a7cd6} + 0 bytes
 UnrealLightmass.exe {0x00007ff67e11257a} + 0 bytes
 UnrealLightmass.exe {0x00007ff67e040d03} + 0 bytes
 UnrealLightmass.exe {0x00007ff67e0a6552} + 0 bytes
 UnrealLightmass.exe {0x00007ff67e0a8270} + 0 bytes
 UnrealLightmass.exe {0x00007ff67e07293f} + 0 bytes
 UnrealLightmass.exe {0x00007ff67e0af358} + 0 bytes
 UnrealLightmass.exe {0x00007ff67e0cd8ef} + 0 bytes
 UnrealLightmass.exe {0x00007ff67e12949b} + 0 bytes
 KERNEL32.DLL {0x00007ffcf42613d2} + 0 bytes
 ntdll.dll {0x00007ffcf6bf5444} + 0 bytes
 ntdll.dll {0x00007ffcf6bf5444} + 0 bytes


Product Version: UE 4.8 Preview
Tags:
lightmasscrash.txt (74.4 kB)
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asked May 14 '15 at 11:48 PM in Bug Reports

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druidsbane
187 11 21 171

avatar image druidsbane May 15 '15 at 01:26 AM

I just tested on a completely brand new "FirstPersonExample" level with starter content enabled and I get the same error.

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Latest source build seems to have fixed it. Nothing to see here!

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answered May 15 '15 at 02:20 AM

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druidsbane
187 11 21 171

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