This means a field on one of the tabs (most likely the VIEWRES setting on the Display tab) is storing an invalid number. The error is triggered when you try to exit, as AutoCAD performs a final validation of all settings.

: Type HPMAXLINES into the command line and set it to a higher value (up to 10,000,000) to allow for denser hatch patterns. Summary Table of Relevant Commands Valid Range VIEWRES Controls the smoothness of circles and arcs 1 – 20,000 HPMAXLINES Sets the maximum number of lines in a hatch pattern 100 – 10,000,000 LTSCALE Global linetype scale factor Any positive integer

Restart the offending command cleanly:

The best way to avoid the error is to know the required data types for the commands you use frequently. AutoCAD has many commands that require integer inputs (whole numbers) rather than real numbers (decimals) or strings (text). For example, knowing that DIVIDE asks for a number of equal segments will prepare you to give it an integer like 24, not a fraction like 24.5.

Click to remove unused blocks, layers, and linetypes that might be bloating the file. Best Practices to Prevent Future Errors

Reset the implicated system variable or setting to default:

When prompted to "Enter circle zoom percent (1-20000)", type a valid positive integer like or 2000 and press Enter . Try opening the Options Dialog again by typing OPTIONS . Alternative Fixes

you were running when the error popped up (e.g., Hatch, Save, Xref)? The AutoCAD version you are currently using. If this happens on all drawings or just one specific file. Share public link