Frequent PSO Crash

Development Rendering
, ,
1

Hello!

We are getting a pretty consistent assert in MarkCompliaionComplete (PSOPrecacheMaterial.cpp):

LogWindows: Error: appError called: Assertion failed: !CheckCompilingPSOs(*FindResult, false ) [File:\Engine\Source\Runtime\Engine\Private\PSOPrecacheMaterial.cpp] [Line: 581]

We have merged CL 42765782 from ue5-main release branch to get a little more information out of the assert.

But if you have any ideas or things we can try that would be great!

Thanks, Nicole.

2

Steps to Reproduce

3

Hi,

thanks for reaching out. Hitting the assert in MarkCompilationComplete has been reported by some other UE licensees as well in these threads and is likely caused by a race condition:

[Content removed]

[Content removed]

[Content removed] (you can translate this to English by right-clicking in Chrome)

There is also a bug report under https://issues.unrealengine.com/issue/UE-288175.

From those last two cases, it seems that a possible workaround is to comment out the verify statement in CL 42765782 (after applying that commit). Could you try that and see if it prevents the crash?

Thanks,

Sa,

4

Hi Sam,

Thanks for the speedy reply!

Yeah so we have merged that CL, I’ll comment out the assert and replace it with a log.

We are also in 5.6 by the way, so the issue still occurs in this version.

Thanks,

Nicole

5

Hi and thanks for the update. Please let me know if commenting out the assert works.

Thanks,

Sam