This message comes from the lp(1) print scheduler, indicating that it is either extremely busy or hanging.
If print jobs are coming out of the printer in question, wait until they are finished and then resubmit this print job. If you see this message again, the lp(1) system is probably hanging.
For a procedure to clear the queue, refer to "lp hang".
If lp(1) is unable to create a device for printer messages, the message FIFO could already be in use or could be locked by another print job.
For more information on the print scheduler, see the section on administrating printers in the System Administration Guide, Volume 2.