Internal Error 2602 — Autocad

Troubleshooting AutoCAD: Demystifying "Internal Error 2602"

Few things are as frustrating as an application crashing just as you try to save your work or open a critical file. In the world of AutoCAD, one specific and cryptic message that has plagued users for years is "Internal Error 2602."

This error usually appears with little context, causing the software to shut down unexpectedly. While Autodesk’s official documentation on this specific error code can be sparse, community consensus and technical diagnostics have identified the primary culprits. internal error 2602 autocad

Here is a breakdown of what causes Error 2602 and how to resolve it. Regularly AUDIT + PURGE drawings Avoid copy-pasting between

Prevention Tips

Immediate Steps to Recover Your Work

If you see Error 2602 right now, follow these steps before trying complex repairs. Immediate Steps to Recover Your Work If you

Solution 1: WBLOCK the Entire Drawing

WBLOCK (Write Block) extracts only valid entities, leaving corrupt dictionaries behind.

  1. Open the problematic drawing.
  2. Type WBLOCK → Enter.
  3. In the dialog:
    • Source: Select "Entire drawing".
    • Destination: Choose a new file name and path.
  4. Click OK. Open the new file and test if Error 2602 reappears.

Why this works: WBLOCK does not copy unnamed, corrupt, or orphaned objects that standard SAVE does.

Step 3: Save As DXF (The Nuclear Option)

If the error persists, use the DXF swap:

  1. Type DXFOUT and save the file as ASCII DXF (not binary).
  2. Close AutoCAD completely.
  3. Reopen AutoCAD, type DXFIN, and import that DXF.
  4. Save as a new DWG. This forces a complete rewrite of the database structure.

7. Check fonts