Internal Error 2602 in AutoCAD is typically associated with installation or update failures

Interrupted Installation: Power loss or system crashes during a setup process.

Conclusion

Internal Error 2602 in AutoCAD is a serious but solvable database corruption or graphics memory error. It is not a random glitch. By systematically applying drawing recovery tools, managing custom applications, and verifying hardware drivers, users can almost always recover their work. The key is to avoid simple reinstalls and focus on the drawing database itself.

When to escalate

Purge Registered Applications (critical for 2602)

Restoring AutoCAD after a 2602 error requires a systematic refresh of both the software's licensing environment and the host system's graphical drivers. Are you experiencing this error during a fresh installation or while applying a specific update AutoCAD 2019 1.2 Update Error Message - Autodesk Forums

Graphics and drivers

Fixing AutoCAD "Internal Error 2602": A Guide to High-Quality Plotting

You’ve spent hours perfecting your design. The lineweights are immaculate, the layers are organized, and you are ready to produce that high-quality plot for your client or construction team. You hit Plot, and then it happens:

Error Report