: Windows security settings preventing AutoCAD from accessing its own installation folder.
AutoCAD stores user preferences, hardware acceleration settings, and support paths in the Windows Registry. If the profile keys responsible for the Shape Manager or Graphics Configuration become corrupted, the module may initialize with null pointers or invalid memory addresses, causing an immediate fatal error. autocad fatal error acismobj20dbx best
Fixing the AutoCAD Fatal Error acismobj20.dbx: Best Proven Solutions hardware acceleration settings