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Swarm crash with certainly not memory or cache problem?

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    Swarm crash with certainly not memory or cache problem?

    First of all, I allocated 140gb to virtual memory on top of 32gb ram so, it can't be a memory issue.

    I cleaned and validated swarm cache, I 'Save As' the whole map and purged the old one, checked the lightmap resolution (there's only few 2048 resolutions)

    And the swarm crash right when it start working on "processing mappings" after skylight radiosity.

    In case it's location sensitive error, I checked 0,0,0 and there's nothing sitting there.

    Here's what I get:

    Fatal error: [File:/Build/++UE4+Licensee/Sync/Engine/Source/Programs/UnrealLightmass/Private/Lighting/LightingSystem.cpp] [Line: 1458]
    Static lighting thread exception:
    Unhandled Exception: EXCEPTION_INT_DIVIDE_BY_ZERO

    0x00007ff67b7f8172 UnrealLightmass.exe!Lightmass::FStaticLightingSystem::IncomingRadianceAdaptive<Lightmass::TFinalGatherSample<2> >() []
    0x00007ff67b80c2b6 UnrealLightmass.exe!Lightmass::FStaticLightingSystem::CachePointIncomingRadiance() []
    0x00007ff67b8ae9a4 UnrealLightmass.exe!Lightmass::FStaticLightingSystem::ProcessCacheIndirectLightingTask() []
    0x00007ff67b8a425d UnrealLightmass.exe!Lightmass::FStaticLightingSystem::CalculateIndirectLightingTextureMapping() []
    0x00007ff67b8b1341 UnrealLightmass.exe!Lightmass::FStaticLightingSystem::ProcessTextureMapping() []
    0x00007ff67b8982d4 UnrealLightmass.exe!Lightmass::FStaticLightingSystem::ThreadLoop() []
    0x00007ff67b8935c3 UnrealLightmass.exe!Lightmass::FMappingProcessingThreadRunnable::Run() []
    0x00007ffe754d19f7 UnrealLightmass-Core.dll!UnknownFunction []
    0x00007ffe754c9c60 UnrealLightmass-Core.dll!UnknownFunction []
    0x00007fff0c3d7bd4 KERNEL32.DLL!UnknownFunction []
    0x00007fff0ca6ce51 ntdll.dll!UnknownFunction []

    0x00007ff67b8880b6 UnrealLightmass.exe!Lightmass::FStaticLightingSystem::MultithreadProcess() []
    0x00007ff67b8575f4 UnrealLightmass.exe!Lightmass::FStaticLightingSystem::FStaticLightingSystem() []
    0x00007ff67b80a529 UnrealLightmass.exe!Lightmass::BuildStaticLighting() []
    0x00007ff67b8310d7 UnrealLightmass.exe!Lightmass::LightmassMain() []
    0x00007ff67b84f8d3 UnrealLightmass.exe!main() []
    0x00007ff67b8b6c64 UnrealLightmass.exe!__scrt_common_main_seh() []
    0x00007fff0c3d7bd4 KERNEL32.DLL!UnknownFunction []
    0x00007fff0ca6ce51 ntdll.dll!UnknownFunction []


    And this follows on the tail which doesn't look too important:

    CreateProc failed: The system cannot find the file specified. (0x00000002)
    URL: ../DotNET/AutoReporter.exe 11564 "UE4AutoReportDump.txt" "UnrealLight_DESKTOP-8AIKHUK_42E97C1F42DAEAC10C00B5A137308376.log" "UE4AutoReportIniDump.txt" "" -unattended
    Couldn't start up the Auto Reporting process!
    *** CRITICAL ERROR! Machine: DESKTOP-8AIKHUK
    *** CRITICAL ERROR! Logfile: UnrealLight_DESKTOP-8AIKHUK_42E97C1F42DAEAC10C00B5A137308376.log
    *** CRITICAL ERROR! Crash report:


    Please let me know if there's anything suspicious!

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