Autodesk's free viewer, DWG TrueView, has a more tolerant DWG engine.
Summary:
Error 2602 is fixable in most cases without data loss. Start with RECOVER and -PURGE; if that fails, the DXF export method has the highest success rate. Avoid opening the file again in the same session before attempting recovery.
Here’s a complete review of the AutoCAD Internal Error 2602 — what it means, common causes, and how to fix it. internal error 2602 autocad
Internal Error 2602 is generally classified as an Unhandled Exception or an Access Violation. In plain English, this means AutoCAD attempted to perform an action (like reading a block definition, loading a DLL file, or saving geometry) but the operating system said "No."
The error is often tied to:
If you want, tell me: Windows version and the exact message text (and whether this was install/uninstall/repair) and I’ll give precise next commands and which logs lines to check.
Method A: Via the Windows Start Menu (Preferred) Autodesk's free viewer, DWG TrueView, has a more
Method B: Via the App Manager