An Unknown Error Parm ~upd~ | Adobe Illustrator Operation Cannot Complete Because Of

: Reset any custom path strokes to "Basic" or recreate complex brushes in a new file. System & App Maintenance

The [PARM] error in Adobe Illustrator is rarely a fatal file corruption – it usually signals a with paths, permissions, preferences, or a specific object. The fastest resolution is to: : Reset any custom path strokes to "Basic"

If none of the above solutions work, you may need to reinstall Adobe Illustrator. Make sure to: : Reset any custom path strokes to "Basic"