Most professional drawing programs like Illustrator allow you to define how a line ends: square, circular,… . PostScript uses the ‘setlinecap’ command to pass this information on to the RIP. So a PostScript error, offending command ‘setlinecap’ points to a problem with a custom PostScript line or an imported graphic with a custom line.
- Try opening all the EPS-files made in Illustrator, CorelDraw,… see whether specific linecaps where used and change those. Resave the files and try printing again.
- The problem may also be caused by a bug in the RIP software. Check if updates are available.