: This is the most common solution. Hold Alt + Control + Shift (Windows) or Option + Command + Shift (macOS) while launching Illustrator to restore default settings. Note that this will remove your custom settings.
If the error occurs during manual stroke manipulation, select your path, change your path stroke profile back to Basic , and then manually re-add your specialized arrows or custom dash attributes.
Copy layers one by one into a new file to identify which specific object is causing the crash . 3. Check Software and Hardware Conflicts : This is the most common solution
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Adobe stores GPU shader caches that can become corrupted. If the error occurs during manual stroke manipulation,
Close Illustrator, then relaunch it while immediately holding Cmd+Option+Shift (Mac) or Ctrl+Alt+Shift (Windows).
The PARM error is often an indicator that Illustrator has reached a limit in its processing capabilities or encountered a file-level corruption. Common scenarios include: Check Software and Hardware Conflicts End of Paper
If you cannot open a file at all due to the PARM error, but you suspect a text issue:
This error typically triggers when you try to save a file, export an asset, copy-paste objects, or apply complex vector effects. Because the error points to a vague "parm" (parameter) mismatch within the application code, identifying the root cause requires a systematic troubleshooting approach.
Complex artwork with thousands of anchor points can overwhelm the preview engine. Select your art and go to Object > Path > Simplify to reduce complexity. Fix unknown error issues in Illustrator - Adobe Help Center
To minimize the likelihood of encountering this error in the future: