Ray Tracing - Crash inside the platform compiler

Hi there everyone,

I’m having some frustrating issues with my UE4 - whenever I turn on Ray Tracing and SkinCache Compile Shaders in a project, the splash loading screen gets to 95% but then crashes during shader compilation.

The error that appears should be attached as an image -

“Crash inside the platform compiler!
Internal error or exception inside dxcompiler.dll”

I came to the conclusion that it was RayTracing and SkinCache causing the error as whenever I turn them on in new or existing projects, the crash on start up happens.
The only way to make the project open again is to delete the ‘DefaultEngine.ini’ config file, which obviously is what stores the ‘enable’ function for those features.

Any help on this would be great as it is currently preventing me from working on any Ray Traced projects.

I have updated my nVidia drivers and I am using a 3080 card. This error happens in both 4.26 and 4.27 projects.

Thank you!
Sean

Here is the second part of the error (which comes up in the Output log / where I can choose to send to Epic etc.)

LoginId:6d0604a640eb86cd692f8d95816a7a15
EpicAccountId:a2ea5001dc164175b806acfdcb1984dc

Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Public\Containers/Array.h] [Line: 703] Array index out of bounds: 0 from an array of size 0

UE4Editor_Core
UE4Editor_Core
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Core
UE4Editor_Core
kernel32
ntdll

Did anyone get a solution to this issue?

Having the EXACT same issue. I have disabled the Ray tracing, that’s how I could reopen it.

Any solution to this??

Thanks!