Xerox 721 Message Manual - page 190
OSS (OPERATING SYSTEM SOFTWARE) MESSAGES
OS9991
Invalid or destroyed task images:
Indicated driver files required for operation of the system appear
to have been destroyed on the system disk.
Action
1. Reboot the system by pressing the Boot button, then
entering B.
2. If the message reappears, resysgen if authorized to do so
(refer to your 4635 LPS System Generation Guide),
or
Contact your systems specialist or Xerox Service Support Center.
OS9992
Driver task files not found:
This message is displayed at system boot time. This usually
indicates that a system generation was performed with a
configuration which does not match the current configuration.
Action
Resysgen with the proper configuration, if authorized to do so,
(refer to your 4635 LPS System Generation Guide),
or
Contact your systems specialist.
OS9993
Memory too degraded to load device drivers.
There is not enough memory to load the system device drivers.
Action
Contact your systems specialist or Xerox Customer Service.
OS9994
Unable to find system tasks.
The disk files required for proper operation of the system appear
to have been destroyed on the system disk.
Action
1. Reboot the system by pressing the Boot button, then
entering B.
2. If the message reappears, resysgen if authorized to do so,
(refer to your 4635 LPS System Generation Guide),
or
Contact your systems specialist.
OS9995
System not operational.
The disk files required for proper operation of the system appear
to have been destroyed on the system disk.
Action
1. Reboot the system by pressing the Boot button, then
entering B.
2. If the message reappears, resysgen if authorized to do so
(refer to your 4635 LPS System Generation Guide),
or
Contact your systems specialist.
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XEROX 4635 LASER PRINTING SYSTEM MESSAGE GUIDE