We have one user with a Vista machine that about once a week to once every two weeks sends a print job to a shared printer that lots of other users print to. She is sending a normal sized one or two page print job. When the user prints and the issue occurs the printer will not print and has a error on the screen that says RIP software error 900. We restart the printer and any print jobs in the que print with no problem. We have tried reinstalling the print driver and setting the printer to print directly and not spool the print job. None of these issues have resolved the issue yet.