Type GRAPHICSCONFIG in AutoCAD. Toggle Hardware Acceleration on or off to see if the error persists.
Prepare this data before contacting:
Sometimes, a user profile in Windows can become corrupted to the point where it interferes with applications. Creating a fresh, new local user account on your PC and trying to run AutoCAD from there can help determine if your main profile is the cause.
Choose the option to back up your current custom settings before the reset occurs. Summary of Best Practices to Prevent Future Fatal Errors autocad fatal error acismobj20dbx best
AutoCAD Fatal Error acismobj20dbx: Best Solutions and Troubleshooting Guide
: Autodesk regularly releases hotfixes for DBX library errors. Ensure you have the latest updates from the Autodesk Account portal or the Autodesk Access app .
Several users on the Autodesk forums have suggested that errors like acismobj20.dbx arise because the file lacks the necessary privileges once it’s created. Running as an administrator can bypass this permission issue. Type GRAPHICSCONFIG in AutoCAD
Last updated: 2025
: Paradoxically, high-performance GPU modes can sometimes cause driver conflicts. Go to Windows Graphics Settings . Browse for acad.exe in your program files.
: If an upgrade is not budgeted, use Windows Recovery to revert the operating system to a version or update point deployed prior to when the crashes started happening. 2. Configure High-Performance Graphics Settings Creating a fresh, new local user account on
In most cases, only one drawing is corrupted—not your entire AutoCAD installation. Try the following:
Explode the block if necessary, then save this as a new file. Phase 2: System and Hardware Optimizations