Build Lighting make Crash Unreal 5

[stepharamburu]

Hi. Using a Unreal 5 VR template with nothing new on there, just the basic template, any time I do “build lighting” the program crash showing this message on crash reporter window:
Assertion failed: CurrentGPUVirtualAddress != 0 [File:D:\build++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12DescriptorCache.cpp] [Line: 729]
My PC specs: i7 6700k 32GB RAM Video RTX3060ti

[feralmoans]

This is happening to me as well on multiple maps, including default VR template map. I have previously had no issues using Build Lighting with UE5EA and also UE4.

Same crash error message too:
Assertion failed: CurrentGPUVirtualAddress != 0 [File:D:\build++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12DescriptorCache.cpp] [Line: 729]

Any help at all is appreciated!

[feralmoans]

Resolved this issue by switching project from DX12 to DX11, per this solution:

OpenXR VR Template | Feedback and Discussion

Hey @Kavan - thanks for the report. This comes as a surprise as I was baking lighting and flipping project settings up until days prior to release… however, I was able to reproduce the issue and I have a workaround: In Project Settings → Platforms → Windows → Targeted RHIs → Default RHI. Change from DirectX 12 to DirectX 11. OR In /Project/Config/DefaultEngine.ini, change DefaultGraphicsRHI=DefaultGraphicsRHI_DX12, to DefaultGraphicsRHI=DefaultGraphicsRHI_DX11 I’ve logged the issue and will…

I believe this might prevent UE5 features like Nanite from working though? Hoping for a fix in a patch soon.

[stepharamburu]

Yes, the problem was resolved baking lighting on DirectX11. Thank you!

[eduardoavdr]

Thank you!! it works!! I was really desperate!!