Unreal Engine 5.1.1 Crash

General Feedback & Requests
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Hello,
I’m posting to ask for help resolving a crash issue in Unreal Engine 5.1.1.
I was working through the book “Mastering Game Development with Unreal Engine 5” （Unreal Engine5で極めるゲーム開発）for study purposes,
but the engine crashed while I was editing a physics asset. Since then, it crashes immediately whenever the physics asset’s thumbnail appears on screen.
I’ve tried reinstalling Unreal Engine, but the crash persists, and I’m really struggling.

If anyone knows a solution, I would greatly appreciate your assistance.

▼The asset PHYS_Ninja was working on last in the image causes the game to crash immediately after this screen.

image
image1919×1199 336 KB

▼Crash Log

LoginId:a6880a064e1f6b177624f28a0bb3a096
EpicAccountId:9620383a2aea417fabf43af8a6ba2a97

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000000000000a8

UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_Engine
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor_UnrealEd
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
kernel32
ntdll
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Hey there @ponpokodanuki3! Welcome to the community! It seems that the asset itself must have been corrupted somehow.

The first thing to do would be to back the whole project up somewhere safe, then attempt to locate the uasset file in your file explorer, then delete it, then try to launch the project. This should resolve the issue, and you can recreate the physics asset. Since there are references from the SKM you may see some one time errors when you first open them.

Let me know how it goes!

1 Like
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I agree, removing the corrupted asset should do the trick. I would also recommend clearing your engine and project’s cache folders, to remove any trace of corruption. Please check the following locations (Project directory and UE install), and delete the folders (the engine will regenerate them on next startup):

  • …\Saved\DerivedDataCache\
  • …\AppData\Local\UnrealEngine\Common\DerivedDataCache\

Additionally, to avoid further issues, you can clear the thumbnail’s cache, and force UE to re-create it from scratch, by eliminating the contents at “YourProject”/Saved/ThumbnailCache/