After Effects Error Asked To Create Unknown Property Of Type File

The error means that the software received an instruction to create a property that it does not recognize or cannot render in the current context.

Navigate to the preferences folder and rename it: after effects error asked to create unknown property of type

Would you like a for an After Effects bug report, or a deeper look into how expression/property lookup works internally? The error means that the software received an

This usually means:

“Unable to execute script. Unknown property of type ‘Something’.” after effects error asked to create unknown property of type

The is intimidating, but it is rarely a sign of permanent data loss. In the vast majority of cases, the error simply means there is a mismatch between what the project expects and what your software understands.