Editor crashing on windows 10 pro?

Development Platform & Builds
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1

This is the error I keep getting.

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

"Assertion failed: (uint32)BlendMode < NumBSS [File:d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\public\BatchedElements.h] [Line: 307]
"

UE4Editor_Core!FDebug::AssertFailed() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\core\private\misc\outputdevice.cpp:354]
UE4Editor_Engine!FBatchedElements::FSimpleElementBSSContainer::GetBSS() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\public\batchedeleme
UE4Editor_Engine!FBatchedElements::PrepareShaders() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\batchedelements.cpp:661]
UE4Editor_Engine!FBatchedElements::Draw() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.9\engine\source\runtime\engine\private\batchedelements.cpp:1063]
UE4Editor_Engine!FCanvasBatchedElementRenderItem::Render_GameThread'::8’::EURCMacro_runtime\engin
UE4Editor_Engine!TGraphTask<`FCanvasBatchedElementRenderItem::Render\engine\source\rufaces.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]

2

Hello JonLuk -

Can you provide me with some context as to what you were attempting to accomplish when the crash occurred? Also please make sure that you have submitted the crash with crash reporter and included the Machine ID here.

Thank You

Eric Ketchum

3

Hello Eric,

When I try to start a new project I load up a blank page and try to put in the mesh for the landscape within a min it crashes. However, on 4.8 no problems, I have unistalled 4.9 and reloaded same problem?

4

MachineId:9C48FF9C41F4396296A551894F96F649

5

Hi JonLuk -

Thank you for the additional information. I was able to track this issue to a known bug, UE-20172 for reference, which should be corrected very soon in 4.9.1.

Thank You

Eric Ketchum

6

Hi Eric,

Thank you I thought it was something on my end. Good to know and thank you for the quick response!!

Best,

John