Xerox 721 Message Manual page 249

4635 LPS ADDITIONAL MESSAGES
15-6
568 Transmit queue full
The communication driver's transmit queue is full.
Action Select the OK header button to retry the process. If the problem
persists, call Xerox Customer Service.
569 Can't kill Terminal Emulation Mode timer
The TEM (terminal emulation mode) timer is not active or cannot
be turned off. Probably the result of an internal PC user interface
error.
Action Select the OK header button to retry the process. If the problem
persists, call Xerox Customer Service.
570 Invalid ESS signal ID
The system controller signal indicator is out of range. May mean
outdated PC user interface software or a protocol error.
Action Select the OK header button to retry the process. If the problem
persists, call Xerox Customer Service.
571 Invalid Acknowledge parameter
The system controller transmitted a character that is invalid in the
current context. It can only be ACK, NACK, or start-of-packet.
Action Select the OK header button to retry the process. If the problem
persists, call Xerox Customer Service.
572 Can't send SM_OBJ message
The message used to notify the system of incoming system
controller data could not be placed on the PC user interface
message queue.
Action Select the OK header button to retry the process. If the problem
persists, call Xerox Customer Service.
573 Invalid paper status update
The contents of the PAPER signal is not valid.
Action Select the OK header button to retry the process. If the problem
persists, call Xerox Customer Service.
574 Invalid custom signal data
The format of this system controller signal is invalid.
Action Select the OK header button to retry the process. If the problem
persists, call Xerox Customer Service.
XEROX 4635 LASER PRINTING SYSTEM MESSAGE GUIDE