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After Effects Error Asked To Create Unknown Property Of Type Fix |top| -

asked to create unknown property of type

The After Effects error message "" typically indicates a conflict between the software and a specific script, third-party plugin, or a corrupted project property. This error often prevents users from opening a project entirely or pops up repeatedly during startup. Common Causes of the Error

When working in Adobe After Effects (often when copying and pasting keyframes, using expressions, or installing third-party scripts/plugins), you receive the following error message: asked to create unknown property of type The

Clear Global Disk Cache:

/Applications/Adobe After Effects [Version]/Scripts/ScriptUI Panels Pre‑compose the layer (leave all attributes)

2. Identify What Triggers the Error

  1. Outdated or corrupted plugins: If you're using outdated or corrupted plugins, they might not be compatible with the latest version of After Effects, leading to this error.
  2. Incorrect expression syntax: Expressions are a powerful tool in After Effects, but if the syntax is incorrect, it can cause errors.
  3. Missing or renamed properties: If a property is missing or has been renamed, After Effects might not recognize it, resulting in this error.
  4. Scripting errors: Scripts can also cause this error if they're not written correctly or are trying to access non-existent properties.
  5. Version compatibility issues: If you're working with projects created in older versions of After Effects, you might encounter compatibility issues that lead to this error.

Update Legacy Expressions

: Go to File > Scripts > Update Legacy Expressions.jsx to fix older expression syntax that might be confusing the newer engine . When working in Adobe After Effects (often when