Error 13

I built a program in AppleScript Studio which works with InDesign CS/CS2. One of my beta-testers reports that every time he tries to run the progarm, InDesign CS2 displays this dialog:

“AppleScript Error!
Error Number: 13
Error String: An error of type 13 has occurred.”

He’s on Mac OS X 10.4.3.

I can’t reproduce it and can’t find any references to this error.

Any ideas?

Thanks,
Leo

If you can post the script for our troubleshooting that would be helpful.