After Effects Error Asked To Create Unknown Property Of Type Fix Link Link

By following these solutions and preventative measures, you should be able to resolve the "Asked to create unknown property of type" error in Adobe After Effects and get back to creating stunning visual effects and motion graphics.

This violates Adobe’s support terms, but it has saved many projects. Backup the original first. By following these solutions and preventative measures, you

The is a disruptive warning that typically occurs due to outdated expressions, broken pseudo-effects, or incompatible third-party scripts trying to generate properties that After Effects no longer recognizes . This error frequently locks users into a repetitive dialog box loop or completely crashes the software when opening complex templates. Direct Core Solutions Root Cause Immediate Fix Location in Menu Legacy Expressions Update to modern JavaScript parsing. File > Scripts > Update Legacy Expressions.jsx Expression Engine Mismatch Revert engine to legacy compatibility mode. File > Project Settings > Expressions Corrupted Script UI Panels Isolate and remove third-party automation tools. Support Files / Scripts / ScriptUI Panels Corrupted Application State Hard reset preference files on launch. Ctrl+Alt+Shift (Win) / Cmd+Opt+Shift (Mac) 1. Fix Legacy and Broken Expressions The is a disruptive warning that typically occurs

Complex dropdown combinations confuse the properties hierarchy. Simplify structure using time-remapping workflows. System memory reads outdated layout definitions. Purge memory or clear user preference configurations. 💡 Best Practices to Avoid Property Conflicts asked to create unknown property of type - Adobe Community File > Scripts > Update Legacy Expressions

The error is almost always . Note when it appears:

If you are using a third-party script, the fix is different.

Code is trying to apply a 2D position property to a 3D layer, or vice versa, causing a type mismatch.