[New Clean Project File] ──> [File > Import > File] ──> [Select Broken Project] asked to create unknown property of type - Adobe Community
Move the scripts back , restarting After Effects each time, until the error reappears. This confirms which script is incompatible. Secondary Solutions
The mysterious is not a standard property type. In software engineering, "fix" is often a placeholder or a generic reference to a fixed-point number (a decimal stored as an integer). In Adobe’s internal debug logs, "fix" appears when the application attempts to dynamically create a property based on corrupted data. [New Clean Project File] ──> [File > Import
A layer named "Target" was changed to "Goal," breaking a thisComp.layer("Target") reference.
One of the most frequent culprits behind this error is a conflict or incompatibility introduced by third-party scripts, extensions, or UI panels. In software engineering, "fix" is often a placeholder
Here are the most effective solutions, ordered from simplest to most advanced. 1. Run "Update Legacy Expressions"
Before reopening After Effects after encountering the error, run through this checklist: One of the most frequent culprits behind this
If updating legacy expressions didn't work, try changing the engine your project uses to evaluate them.
Sometimes, an expression tries to create a keyframe where none can exist, or it tries to access a property that cannot exist. Ensure you are correctly accessing property values. Example: thisComp.layer("Layer").transform.opacity.value; Scenario C: Using Expression Controllers
Sometimes, a script-generated effect gets corrupted. Delete the effect and run the script again. 5. Preventive Measures
In your expressions, write robust code that checks for an effect's existence first: javascript