Editor crashing when opening Project Settings UE5.4.3

SergioAAV · August 18, 2024, 12:22am

Hello everyone,

Out of nowhere this week my editor started crashing when I open Project Settings.

This is the error:

Fatal error: [File:D:\build++UE5\Sync\Engine\Source\Runtime\RHI\Private\PipelineStateCache.cpp] [Line: 419]
Shader compilation failures are Fatal.

0x00007ffa8c5f491a UnrealEditor-RHI.dll!UnknownFunction
0x00007ffa8c5dff88 UnrealEditor-RHI.dll!UnknownFunction
0x00007ffa8c5e8fb8 UnrealEditor-RHI.dll!UnknownFunction
0x00007ff9d786b7bd UnrealEditor-Core.dll!UnknownFunction
0x00007ff9d7874c83 UnrealEditor-Core.dll!UnknownFunction
0x00007ff9d78824c5 UnrealEditor-Core.dll!UnknownFunction
0x00007ff9d78821ff UnrealEditor-Core.dll!UnknownFunction
0x00007ff9d78aa155 UnrealEditor-Core.dll!UnknownFunction
0x00007ff9d78723d0 UnrealEditor-Core.dll!UnknownFunction
0x00007ff9d7a77c93 UnrealEditor-Core.dll!UnknownFunction
0x00007ff9d7edc93d UnrealEditor-Core.dll!UnknownFunction
0x00007ff9d7ed02b7 UnrealEditor-Core.dll!UnknownFunction
0x00007ffaafad257d KERNEL32.DLL!UnknownFunction

Crash in runnable thread Background Worker #15

During this last week, no new plugins were installed in the engine or game. I only had two windows updates done (KB5042099 about .NET framework and KB5041585 about the OS). I’m not using DLSS.
To try to fix things, I completely removed the updates, uninstalled Unreal, reinstalled Unreal, updated my graphics driver from nVidia (using Studio Drivers). Nothing gave me a different result. The only thing that made me able to open Project Setting again was to edit RHI to DirectX 11 directly in the DefaultEngine.ini file.
Does anyone know how to fix this so I can get back to using DirectX 12?

fjznxiss · September 24, 2024, 2:43pm

My problem is UE5 always crashing when packaging.
And the log have the same words:
Crash in runnable thread Background Worker ***

Finally, I solve the problem. It’s about CPU.
If you are using Intel 12th and 13th generation CPUs, use the Intel extreme tuning utility program to reduce the frequency of the two cores marked with a five pointed star (Intel considers them to have better physical fitness, so they have the highest frequency) to the same frequency as other cores, and the problem is solved.