Project Crashes on Asset Validation

Summary

I am experiencing a very frustrating issue that I cannot pinpoint.

I have a project on 2 computers (we use p4v by Helix Core for Revision Control). The project opens perfectly fine on computer A but crashes when opening on computer B. Both computer A and B have the same specs. Crash report is attached.

Given the crash report, I tried validating assets on Computer A. When doing this, I get the same exact crash report as Computer B. When validating it is clear what assets it is getting hung up on before it crashes. Each time I delete the suspected asset from the project, however, when I open it back up to try validating it will crash again this time on another unrelated asset.

I am at a loss for how to fix this or even troubleshooting. It seems clear something is corrupt, but I have no idea how to identify the exact cause.

Thanks in advance for the help.

Please select what you are reporting on:

Creative

What Type of Bug are you experiencing?

Assets

Steps to Reproduce

Unsure

Expected Result

I can open this project across all machines

Observed Result

Unable to open project on one computer and unable to validate assets

Platform(s)

Windows

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Nice! Having the exact same issue, crashing at asset validation, and the project cannot be reopened, as it crashes every time with “EXCEPTION_ACCESS_VIOLATION reading address 0x00000000000000e0“

Guess we’re out of luck then, unless you found a solution

I managed to salvage ‘some‘ of my work, and I’ll leave the process here in case it becomes useful to someone.

  1. I faced the error when initially validating a skeletal mesh. This skeletal mesh was moved from a different folder in the content browser, so it had created redirectors. I thought I had properly cleaned up redirectors, but I may have made some mistake sat some point. I deleted the original folder it came from, and validated the folder containing the skeletal mesh, and that was the first time I came across the issue.
  2. I tried copying the content folder’s contents to a newly created UE5 projects’ content folder, but the crash still happened upon validating the files in the editor. I tried right clicking on the folder and fixing redirectors beforehand (In the new project), but this still resulted in the same crash, with the same skeletal mesh.
  3. I copied the materials and textures folders only, and validated those folders in the new projects. That seems to work so far. I had to manually fix some materials as their texture samplers had become empty. Just select those samplers in the material editor and in the texture slot, and either reset it via the small arrow icon, or set a texture yourself.
    You will also need to fix any material functions you use. I had around 20 master materials, so I can only imagine the pain if you have hundreds of master materials. And I have no idea if blueprints and other complex stuff would work or not.

I couldn’t migrate files via the editor because my project literally crashed upon being opened, as Unreal goes through the assets before fully loading the level it seems. Also my project wasn’t too complex, so while still lost time, it was more perhaps a few days worth of work, as opposed to weeks.

Rogue element - The skeletal mesh crashing the asset validation process could have happened because I may have edited the asset I loaded into Unreal, later in Blender. Essentially, I ‘might have’ loaded the skeletal mesh into Unreal, saved the project and closed it, changed something in the rig in Blender, deleted the old fbx and exported it using the same name. However, I’m not certain I changed it.

This is damage control, not a solution. I hope someone more knowledgeable than me chips in to clarify this.