Can't get Unreal Engine to Launch

Development Platform & Builds
, ,
1

Every time I try to launch any version of the unreal engine (currently trying to use 4.19.2) it will initialize then when it hits 100% it crashes before opening. How do I fix this? I posted the error log below.

Fatal error: [File:D:\Build++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11Util.cpp] [Line: 233] Result failed at D:\Build++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11Viewport.cpp:303 with error 8876017C

UE4Editor_Core!FDebug::AssertFailed() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:419]
UE4Editor_D3D11RHI!VerifyD3D11Result() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\windows\d3d11rhi\private\d3d11util.cpp:233]
UE4Editor_D3D11RHI!FD3D11Viewport::PresentChecked() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\windows\d3d11rhi\private\d3d11viewport.cpp:303]
UE4Editor_D3D11RHI!FD3D11Viewport::Present() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\windows\d3d11rhi\private\d3d11viewport.cpp:486]
UE4Editor_D3D11RHI!FD3D11DynamicRHI::RHIEndDrawingViewport() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\windows\d3d11rhi\private\d3d11viewport.cpp:607]
UE4Editor_RHI!FRHICommandList::EndDrawingViewport() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\rhi\private\rhicommandlist.cpp:1638]
UE4Editor_SlateRHIRenderer!FSlateRHIRenderer::DrawWindow_RenderThread() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\slaterhirenderer\private\slaterhirenderer.cpp:898]
UE4Editor_SlateRHIRenderer!TGraphTask > >::ExecuteTask() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\core\public\async\taskgraphinterfaces.h:829]
UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:665]
UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:574]
UE4Editor_RenderCore!RenderingThreadMain() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\rendercore\private\renderingthread.cpp:331]
UE4Editor_RenderCore!FRenderingThread::Run() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\rendercore\private\renderingthread.cpp:465]
UE4Editor_Core!FRunnableThreadWin::Run() [d:\build++ue4+release-4.19+compile\sync\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:76]

2

Same error here… :confused:

3

Fatal error: [File:D:\Build++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11Util.cpp] [Line: 233] Result failed at D:\Build++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11Viewport.cpp:303 with error 8876017C

Direct crash after start…
Windows 10
16 GB RAM
i7
Nvidia GTX 970 M
Acer Predator Laptop

4

que tiene problema y error

5

Ok, was able to fix it.
Working again!

6

how did you fix it i am having the same issue

7

how were you able to fix it i am having the same issue

8

Using Windows 10.

Like you can see in error message: “D3D11RHI\Private*D3D11*” the error is connected to Direct X 11.

I checked with dxdiag and noticed I already have Direct X 12. (Seems to be updated by Windows update)
Normally it should be no problem, if you have Direct X 12, in this case it’s a problem.

So you only have to force the Unreal Engine to use Direct X 12 and everything works again!

9

Thank you so much for helping me.
Side note, if others have this problem then find your unreal engine.exe where you downloaded your engine then create a shortcut and edit the target after the quotes using a single space then typing -DX12
then save it and this will make it work.

10

Np,
I also asked why it doesn’t work, but they think it’s problem with my laptop, which I doubt!

You can read here:

https://forums.unrealengine.com/community/general-discussion/1497761-why-is-unreal-engine-4-19-2-not-backwards-compatible-with-direct-x-12-per-default-windows-10