The implication is that the command was being prompted when the
failure occurred, as implied by the described effect; although one might
expect that the command itself might fail if prompting failed.
In the output of DSPCMD DSPSYSVAL, is there a "Prompt override
program" listed, other than *NONE?
Was an error expected when the command was prompted; e.g. was an
invalid system value name provided for the parameter, such that the
CPD0084 "&3 not valid for parameter SYSVAL." would have been
appropriately issued?
With the prior incident: Was that scenario also a prompted command?
The same command being prompted, or some other command? While which
device is unknown, was the same display file reported in the messages?
The given messages are purely text, missing both their message
identifiers and the context, aside from words describing the use of
Display System Value command. Provide the spooled joblog to include the
prior request message until the following request message, so the full
context of each message is included; i.e. the spooled joblog includes
the sending and receiving programs and other important information that
enables a review of those diagnosed conditions. As well, the
interactive subsystem to which the device was allocated at the time, may
have some messages spanning near the same time, and that joblog [if any
such messages] would also best be provided.
The first message is apparently CPF5257. That message implies there
should be a prior message logged. The second appears to be CPF9846; a
generic condition issued for any prior error during an I\O request. If
the first message had been unmonitored, then the default behavior of the
OS is to produce some dump data; the spool files for the job(s) that
experienced the issue should be reviewed for a QP
If something else can not be determined...
You could restore the *FILE QDPTDSP attribute DSPF into an alternate
library, restored from an old SAVSYS prior to the first incident, or
from IBM-supplied media, and then compare the DMPOBJ output of each
version of the file to try to determine if there might be some
corruption. Conveniently and suspiciously, that display file is named
in a document describing how to restore such objects from the media:
IBM Software Technical Document number 3335547 (KB article)
Restoring Subsystem Descriptions, QHST Files, Job Queues, or Commands
from a SAVSYS Tape
http://www-912.ibm.com/s_dir/SLKBase.nsf/1ac66549a21402188625680b0002037e/77286821c7169070862565c2007d226b?OpenDocument
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Regards, Chuck