Adobe Illustrator Operation Cannot Complete Because Of An Unknown Error Parm =link= -

restore old preferences or workspaces after reinstall—start fresh.

Illustrator’s preferences file ( AIPrefs ) controls countless parameters. Over time, this file can become corrupted due to crashes, improper shutdowns, or extension conflicts. A corrupted preference file is the leading cause of the [PARM] error during save or export operations.

: Use Select > Object > Stray Points to find and delete invisible, single-anchor points that might be confusing the rendering engine. 5. System-Level Troubleshooting