Guard DNA field accesses with has_field() checks for fields renamed or removed across Blender versions (proxy, dup_group, texcomesh, nodetree, etc.), fix mesh block pointer mismatch in path rewriting, fix mkrelative IndexError when asset path is shorter than blend file path, and add [BAT] console prints for tracing progress. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>