Fill errors are caused by complex or compound paths.

Solutions
If the PostScript error is a “limitcheck” then a graphic on the page is too complex for the RIP. Increase flatness, split paths, simplify the graphic or lower the resolution of the RIP to solve the problem.
Try simplifying the document.
Some drawing programs like FreeHand offer filters to automatically simplify curves. Use these if possible.
If you used the magic wand in PhotoShop to mask some images: recreate the masks using the drawing tools of PhotoShop. This simplifies these often very complex curves.

QMS & Undefinedresult error
A PostScript error “undefinedresult”, offending command “fill” can occur when printing PostScript or TrueType fonts to the QMS 860 printer from FreeHand 4.x - FreeHand 7.x. To get rid of this error, you can call QMS for a printer firmware upgrade or export the illustration as an EPS graphic and print it from another application.