17 option OPTION ERROR Meaning: The option was detected previously, but is no longer detected. Action:   Make sure that the option is installed correctly. 20 PAPER JAM Meaning: Paper has jammed while exiting the printer. Action: See Chapter  4, “Clearing Paper Jams” on page  49. 21 PAPER JAM Meaning: Paper has jammed near one of the trays. Action: See Chapter  4, “Clearing Paper Jams” on page  49. 22 PAPER JAM Meaning: Paper has jammed in the duplex unit. Action: See Chapter  4, “Clearing Paper Jams” on page  49. 23 PAPER JAM Meaning: Paper has jammed near the fuser. Action: See Chapter  4, “Clearing Paper Jams” on page  49. 29 DUPLEX COVER OPEN Meaning: The cover to the duplex unit is open. Action:   Close the cover. 30 MEMORY OVERFLOW Meaning: Memory overflow. The printer has received more data than it can fit into
its memory. Action: If the AUTOCONTINU item in the Config Menu is set to ON, printing
resumes in thirty seconds.   Otherwise, press the Continue/Enter key.   Check the
current page for errors.   See “Memory Requirements” on page  3 for information on
how much memory various options require. 31 MEMORY ALLOC ERROR Meaning: The printer cannot allocate the memory required to print a job. Action: If the AUTOCONTINU item in the Config Menu is set to ON, printing
resumes in thirty seconds.   Otherwise, press the Continue/Enter key.   Check the
current page for errors. 35 COMM ERROR Meaning: Serial communication error. Action: Turn off the printer.   After a minute, turn the printer back on and then
resend the job. 40 MEMORY OPTION ERROR Meaning: A SIMM module is not properly seated in its slot or is in some other way
defective. Action: Turn off the printer.   Reseat the SIMM module (see “Installing a SIMM” on
page  99).   If the message recurs after you restart the printer, call for service. Appendix B.   Printer Messages 167