I also have a 2 x A6000 w/ NVLINK setup, and am experiencing the exact same crash and error message when trying to start Path Tracing in a rather complex scene. Path Tracing does work fine in an empty new map within the same project though, so it seems like it’s geometry-dependent and not related to a plugin mismatch or config issue. For now, I’m kinda giving the metahumans a suspicious side-eye - but may also test without Nanite enabled.