After Effects Error Asked To Create Unknown Property Of Type Fix _best_ 〈Popular 2024〉

If the error repeats infinitely:

How to Fix the "After Effects error: asked to create unknown property of type" Bug

If the application displays an endless error loop before you can even view your timeline, corrupt global preferences are likely blocking standard composition initialization.

Sometimes the newer JavaScript engine fails to interpret specific custom properties. If the error repeats infinitely: How to Fix

Since this is an expression error 90% of the time, you need to find the rogue code.

Sometimes this is just a playback hiccup.

Inspect expressions and JSON/Essential Graphics Sometimes this is just a playback hiccup

If this error appears immediately after running a script (like a motion graphics toolkit or a rigging tool):

If the loop is preventing you from clicking anything or even opening your .aep timeline, you can bypass the corrupted initialization sequence by pulling your assets into an independent project space.

If the error is locked to a specific project file: While the message sounds technical, the underlying causes

But don't worry. While the message sounds technical, the underlying causes and solutions are well-understood. This article will walk you through everything you need to know to get your project back on track.

Go to (or press Ctrl + I on Windows, Cmd + I on Mac). Select your corrupted .aep project file and click Import .

When the error triggers right at system startup before a project is even loaded, a corrupted plugin or background script is responsible. Close After Effects entirely. Navigate to your system's script folder directory: