[Tom Watson]

MCExportInfo::Destruct 5:

I have been writing and extendScript tool for AE and was getting this message. The problem appeared to be in setting the file location object (for a renderQueue Item) as a temporary variable that I was re-using in a loop. The answer in this case was to create an array of file objects in the loop.

My assumption here was that while my (ECMA) script could handle that, it is interacting with the OS and Graphics card which won’t support object mutability.

Although your error is likely from a different root cause, I suspect my solution will be helpful anyway 🙂

Tom