Editor crashes with -DX12 when viewport is visible

When trying to run my Project in editor using DirectX12 (-DX12 as startup), editor crashes instantly when viewport is visible.

[2016.12.12-22.38.11:431][413]LogWindows:Error: === Critical error: ===
[2016.12.12-22.38.11:431][413]LogWindows:Error: Fatal error: [File:D:\Build++UE4+Release-4.13+Compile\Sync\Engine\Source\Runtime\RenderCore\Private\RenderingThread.cpp] [Line: 721]
[2016.12.12-22.38.11:431][413]LogWindows:Error: Rendering thread exception:
[2016.12.12-22.38.11:431][413]LogWindows:Error: Assertion failed: ResourceIndex < MAX_SRVS [File:D:\Build++UE4+Release-4.13+Compile\Sync\Engine\Source\Runtime\Windows\D3D12RHI\Private\D3D12StateCache.cpp] [Line: 1102]

Send crashreport with MachineId:F87B756443F95CE9986941A672FE5264

Logs attached.

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Dx12 support is still fairly new and we are updating as we go forward. Would you mind trying to run -DX12 on 4.14 to see if you still get a crash.


Sure, reported just in case. :slight_smile: Excited to see DX12 running sooner or later. Will test the DX12 on future builds too. I didnt manage to get my Project running yet on 4.14. There was some other issue. Will try on 4.14.1 and later hotfixes soon.

Hi SaOk,

We have not heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you are still experiencing the issue you reported, please respond to this message with additional information and we will follow up.