Hi fiveelement, you probably don't have the full plug-in installed.

There are 2 files to copy: RebuildCurve.js and also RebuildCurve.htm .

I think you will get that error you show there if you have only copied one of those files (RebuildCurve.js) and not both of them which it needs to run properly.

It looks like the script error is when the RebuildCurve script tries to access UI elements which are in the companion file, if it is not present then there will be script errors generated when it tries to do that.

Please let me know if that was not the problem.

- Michael