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Crash on Tab Switching

Hello! I recently started running into engine crashes if I try switching between tabs when game is running in PIE or after I exit PIE. The crashes occur at random.

Here's the error stacktrace I get after the crash. Can anyone please let me know if there are any fixes or workarounds for this? Thank you

 Access violation - code c0000005 (first/second chance not available)
     
     UE4Editor_D3D11RHI!FD3D11DynamicRHI::RHISetShaderSampler() [d:\build\++ue4\sync\engine\source\runtime\windows\d3d11rhi\private\d3d11commands.cpp:648]
     UE4Editor_Engine!FSimpleElementPS::SetParameters() [d:\build\++ue4\sync\engine\source\runtime\engine\private\simpleelementshaders.cpp:69]
     UE4Editor_Engine!FSimpleElementGammaBasePS::SetParameters() [d:\build\++ue4\sync\engine\source\runtime\engine\private\simpleelementshaders.cpp:101]
     UE4Editor_Engine!FBatchedElements::PrepareShaders() [d:\build\++ue4\sync\engine\source\runtime\engine\private\batchedelements.cpp:733]
     UE4Editor_Engine!FBatchedElements::Draw() [d:\build\++ue4\sync\engine\source\runtime\engine\private\batchedelements.cpp:1186]
     UE4Editor_Engine!FCanvasBatchedElementRenderItem::Render_RenderThread() [d:\build\++ue4\sync\engine\source\runtime\engine\private\userinterface\canvas.cpp:401]
     UE4Editor_Engine!FCanvas::Flush_RenderThread() [d:\build\++ue4\sync\engine\source\runtime\engine\private\userinterface\canvas.cpp:726]
     UE4Editor_Engine!FDebugCanvasDrawer::DrawRenderThread() [d:\build\++ue4\sync\engine\source\runtime\engine\private\slate\debugcanvas.cpp:250]
     UE4Editor_SlateRHIRenderer!FSlateRHIRenderingPolicy::DrawElements() [d:\build\++ue4\sync\engine\source\runtime\slaterhirenderer\private\slaterhirenderingpolicy.cpp:1190]
     UE4Editor_SlateRHIRenderer!FSlateRHIRenderer::DrawWindow_RenderThread() [d:\build\++ue4\sync\engine\source\runtime\slaterhirenderer\private\slaterhirenderer.cpp:791]
     UE4Editor_SlateRHIRenderer!TGraphTask<TEnqueueUniqueRenderCommandType<`FSlateRHIRenderer::DrawWindows_Private'::`29'::SlateDrawWindowsCommandName,<lambda_43e86ee7c51f39979e9a39d40b280024> > >::ExecuteTask() [d:\build\++ue4\sync\engine\source\runtime\core\public\async\taskgraphinterfaces.h:829]
     UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() [d:\build\++ue4\sync\engine\source\runtime\core\private\async\taskgraph.cpp:665]
     UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() [d:\build\++ue4\sync\engine\source\runtime\core\private\async\taskgraph.cpp:574]
     UE4Editor_RenderCore!RenderingThreadMain() [d:\build\++ue4\sync\engine\source\runtime\rendercore\private\renderingthread.cpp:333]
     UE4Editor_RenderCore!FRenderingThread::Run() [d:\build\++ue4\sync\engine\source\runtime\rendercore\private\renderingthread.cpp:467]
     UE4Editor_Core!FRunnableThreadWin::Run() [d:\build\++ue4\sync\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:76]



Product Version: UE 4.20
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asked Jun 20 '19 at 05:47 AM in Bug Reports

avatar image

XanderWraik
53 1 6 9

avatar image Maksym Nosatov Jun 20 '19 at 10:55 AM

Hi!Try to verify or reinstall the Engine,will be the best option.If the crashes still occur,i suggest to make the Steps,and workflow how you get it and post it here.If someone will be able to reproduce,than this is bug.Also check if this bug mb fixed in newer version of UE4.

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