After Effects Error Asked To Create Unknown Property Of Type Fix May 2026

If you are running a complex script (like DuIK, Limber, or Plexus) when the error appears:

If nothing else works, you might consider uninstalling and then reinstalling After Effects. If you are running a complex script (like

If this error occurs when pasting keyframes, ensure the source and destination properties are identical types. Match the Data:

  • Match the Data:
  • Workaround: If you need to transfer values, pick-whip the values in an expression instead of copy-pasting, or use the separate dimensions feature to match the data structure.

    • If the file is corrupted at the structural level (XML data corruption), you need to strip the metadata. Workaround: If you need to transfer values, pick-whip

    Warning: This violates Adobe’s support terms, but it has saved many projects. Backup the original first.