If the file refuses to save or accept commands, structural reconstruction is required.
Six weeks later, Adobe released a patch notes entry so obscure that only Leo found it:
Fixed an issue where certain legacy third-party plug-ins could write a
<parm>tag into the private dictionary of a document, causing save and export failures with error ‘parm’. If the file refuses to save or accept
Maya framed the error message screenshot and hung it above her workstation.
It reminded her: sometimes the computer doesn’t give you a solution. It gives you a riddle. And the only way out is to stop fighting the unknown error—and start reading the unknown word. Six weeks later, Adobe released a patch notes
PARM wasn’t a crash.
It was a puzzle.
Hold Ctrl + Alt + Shift (Windows) or Cmd + Option + Shift (Mac) immediately after launching Illustrator. Click Yes when prompted to reset preferences. Fixed an issue where certain legacy third-party plug-ins
Warning: This resets all custom settings (workspaces, shortcuts, presets).