Xara Pro X11 program error

Just lately I've been getting an error message when printing. Any idea what this means?
Attachment 126491

Thanks

But everything prints OK?

Yes - but still shouldn't be getting an error. Nothing has changed as far as the program goes.

Yeah, I get it. These error messages happen from time to time and the code tells the developers (if the error is reported) where in the program the problem occurred.