While AutoCAD does not publicly document specific internal error codes in great detail, Error 2602 is generally attributed to the following factors:

Excessive or corrupt RegApps are a primary cause of error 2602.

If the error persists, the installation itself may be damaged.

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Prepare the following before opening a support case:

Autodesk’s development team has specific hotfixes for Error 2602 in certain verticals (e.g., AutoCAD Electrical 2022, Civil 3D 2023) – a support ticket will grant access to beta patches if available.

If all else fails, you need a clean slate.

Implement these best practices to avoid recurrence:

| Practice | Why it prevents 2602 | |----------|----------------------| | Weekly RECOVERALL | Finds handle corruption before it crashes saves. | | Avoid Paste to Original Coordinates between unrelated drawings | Prevents dictionary key collisions. | | Limit use of unnamed blocks | Named blocks have better handle integrity. | | Run _AUDIT before every _SAVEAS | Ensures outgoing file is clean. | | Disable AutoLISP vlr-object-reactor on large files | Object reactors can cause pointer errors. |