Which you are using (e.g., DWG to PDF, a physical HP/Canon plotter)? Does it happen on all layouts or just one specific sheet?
In the Autodesk setup wizard page that appears, select . autocad fatal error acismobj20dbx free
: You are trying to open a drawing created in a newer version of AutoCAD or a vertical toolset (like Civil 3D or Mechanical) without the proper object enablers. Which you are using (e
The file you are trying to open contains broken 3D geometric data. : You are trying to open a drawing
: If the error persists across all files, your AutoCAD profile may be corrupted. Use the Reset Settings to Default tool found in your Windows Start menu under the AutoCAD folder.
Instead of a full uninstallation, Windows allows you to repair the core files of your Autodesk software, which automatically replaces broken .dbx files. Close all Autodesk applications.