Definition of 0P31


Cause: I/O device is not operational. ln case of a switchable device the message will always
display the higher channel number.
(The X'44F0' status in the CSW is developed by DOS/VS for internal use)
Programmer Action: none.
Operator Action: See Figure 4 at the beginning of this section. Check the device in question
to ensure that it is online, that the meter switches at the unit and control unit are on, and that
the device is powered-up and ready. If you perform corrective action, press STOP and START
on the CPU console. or, if you operate a Model 125, on the keyboard.
If you are unable to clear the condition. issue the ROD command, execute EREP, and keep the
output for problem determination.

Used with Courtesy and Permission of International Business Machines, Inc.