There are usually two codes that regularly show in the error log...
91: The job was reset by the device.
92: The job was manually reset by a user.
Code 91 occurs when then there is a confilct between the MFDs settings and those of the print driver and Auto Continue is enabled. (For example printing a A4 file as a non reduction booklet and not having loaded A3 media.)
This can be overcome by turning 'Auto Continue' off. If the job is the resubmitted the user would then have the ability to check and correct the mismatch by selecting the Printer function key.
User Tools>Printer Features>System>Auto Continue.
Hope this helps.