crashes UE5.6

Hello again!

Thank you for the update and log extract. It is very strange that the error remains related to the debugging symbols module that is already installed.

The crash seems to be ocurring during the FOverlappingCorners process, which is part of the skeletal mesh processing. Then, considering “EXCEPTION_ACCESS_VIOLATION writing address”, this ties to memory corruption, or a null reference.

From what I could gather around the community, this part of the process is involved on mesh data, vertex positions, and generating normals. So, the crash is most likely related to invalid data in your mesh, or corrupt elements in the imported FBX (like LODs).

Considering this, there are some options to test:

  • Check for any invalid data in your mesh. In editor, check the number of vertices, review the import settings used, and temporary remove any LODs implemented on it.

  • Open the mesh in Blender, and perform checks for duplicated/merged verts. As well, select all mesh by trais, and clear all areas of any Non-Manifold geometry.

  • Go to your project folder, and clear the Derived Data Cache folder (usually at C:\Users<YourUser>\AppData\Local\UnrealEngine\Common\DerivedDataCache).

  • Ensure your GPU graphics drivers are up to date, and use the Developer version, if available.

  • Test again with a minimal, simplified mesh, to see if the crash repeats again.