Does this crash happen or only when you open a specific project ?
In the Hardware Configuration dialog box, toggle to OFF .
The specific drawing file has corrupt ACIS geometry.
Explain how to identify within your DWG files. autocad fatal error acismobj20dbx free
This is a primary cause for users on Windows 11 running older versions of AutoCAD (like LT 2016).
Fatal errors related to this specific module usually stem from a few predictable system or file conflicts:
Often, a corrupted user profile within AutoCAD is the culprit. Resetting to factory defaults can wipe out this corruption without reinstalling the software. Does this crash happen or only when you
Autodesk regularly releases updates that patch these specific fatal errors. Check the Autodesk Desktop App or your Autodesk Account portal for the latest updates for your specific version of AutoCAD (e.g., Service Pack 2 for older versions). 5. Run a Clean Reinstall (Last Resort)
For newer versions, use the to check for and install available updates.
The is a solvable problem without spending a penny. Start with clearing your temp files and resetting your user profile. If that fails, rename the .dbx file and run a repair installation. Only in extreme cases will you need a full reinstall. Explain how to identify within your DWG files
If you are seeing this error, work through these steps in order of complexity:
Solution 2: Restore the File Safely (Without Untrusted Downloads)
Have you recently installed any ? I can provide a more targeted solution based on your setup. Share public link