[Crash] Unknown exception - code 00000001

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1

After converting my project from 4.8 to 4.9, I can no longer play the game. The project launches in the editor just fine, but trying to play it in the editor or as a standalone game always leads to an immediate crash with the following error message:

MachineId:250DB571408E3779BE45C98893469443
EpicAccountId:8a58f7c467614bb089ab7a5708d92bdb

Unknown exception - code 00000001 (first/second chance not available)

"Fatal error: [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.9

UE4Editor_Core!FDebug::AssertFailed() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\core\private\misc\outputdevice.cpp:354]
UE4Editor_Engine!FMaterial::GetShader() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\materials\materialshared.cpp:1530]
UE4Editor_Renderer!FShadowDepthDrawingPolicy<1>::FShadowDepthDrawingPolicy<1>() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\renderer\private\shadowrendering.cpp:831]
UE4Editor_Renderer!FShadowDepthDrawingPolicyFactory::DrawDynamicMesh() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\renderer\private\shadowrendering.cpp:1118]
UE4Editor_Renderer!FProjectedShadowInfo::RenderDepthDynamic() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\renderer\private\shadowrendering.cpp:1367]
UE4Editor_Renderer!FProjectedShadowInfo::RenderDepthInner() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\renderer\private\shadowrendering.cpp:1702]
UE4Editor_Renderer!FProjectedShadowInfo::RenderDepth() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\renderer\private\shadowrendering.cpp:1846]
UE4Editor_Renderer!FDeferredShadingSceneRenderer::RenderReflectiveShadowMaps() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\renderer\private\shadowrendering.cpp:3306]
UE4Editor_Renderer!FDeferredShadingSceneRenderer::RenderLights() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\renderer\private\lightrendering.cpp:499]
UE4Editor_Renderer!FDeferredShadingSceneRenderer::Render() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\renderer\private\deferredshadingrenderer.cpp:1130]
UE4Editor_Renderer!RenderViewFamily_RenderThread() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\renderer\private\scenerendering.cpp:1572]
UE4Editor_Renderer!TGraphTask<`FRendererModule::BeginRenderingViewFamily'::`23'::EURCMacro_FDrawSceneCommand>::ExecuteTask() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\core\public\async\taskgraphinterfaces.h:779]
UE4Editor_Core!FTaskThread::ProcessTasks() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\core\private\async\taskgraph.cpp:539]
UE4Editor_Core!FTaskThread::ProcessTasksUntilQuit() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\core\private\async\taskgraph.cpp:340]
UE4Editor_RenderCore!RenderingThreadMain() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\rendercore\private\renderingthread.cpp:310]
UE4Editor_RenderCore!FRenderingThread::Run() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\rendercore\private\renderingthread.cpp:411]
UE4Editor_Core!FRunnableThreadWin::Run() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:74]

I tried deleting the Config, Intermediate and Saved folders as suggested here, but it didn’t solve the problem. Any help would be appreciated!

2

Hello Efrye,

Thank you very much for reporting this crash to us. It has been reported and a bug has been entered to be assessed by our development team.

The ticket number is UE-20693.

Again thank you for reporting this to us. I will keep you up to date on this issue as it progresses.

3

Thanks for your reply, .

I’ve been trying to get to the bottom of this by deleting everything in my scene one by one until the crashing stops. Turns out it’s caused by Light Propagation Volumes in combination with translucent materials on skeletal meshes. In my own project it also happens on some static meshes, but I wasn’t able to reproduce it in other projects.

I attached a sample scene to demonstrate the issue. Simply drag the “M_Refraction” material on the skeletal mesh and the editor should crash immediately. Note that Light Propagation Volumes have to be turned on in the consoleVariables.ini for this to happen.

You can download the project here.

4

In case this ticket is still open: This issue seems to be fixed in the 4.10 preview. I can use LPV and translucent materials without any crashes again.