IBM Mainframe Discussion List <IBM-MAIN@BAMA.UA.EDU> wrote on 12/20/2006
08:30:57 AM:
> Running z/OS V1.4
>
> I recently set the following slip trap for an IOS050I message
>
> IOS050I CHANNEL DETECTED ERROR ON 35C0,11,86,**02,PCHID=0140
>
>
> SET SLIP,ID=IOS1,A=SVCD,ML=2,MSGID=IOS050I,END
>
> Slip shows:
>
> IEE735I 08.29.43 SLIP DISPLAY 202
> ID=IOS1,NONPER,ENABLED
> ACTION=SVCD,SET BY CONS *ROUT034,RBLEVEL=ERROR,MATCHLIM=2,0
> MSGID=IOS050I
>
>
>
> Later the IOS050I message occurred but the slip trap did not go off.
> Am I missing something or is it possible the MSGID= does not always
trigger?
This is covered by some caveats in the SLIP manual:
SLIP does not get control:
For messages that are reissued, for example, messages that are issued on
one system and appear on another, or branch entry WTOs that are reissued.
For branch entry WTO if the NLCKS, LOADWAIT, or SYNCH=YES parameter is
specified on the WTO invocation.
For branch entry WTO in certain situations where abending the unit of work
may cause system problems.
For minor lines associated with a branch entry WTO.
The applicable one in this case is "where abending the
unit of work may cause system problems."
What that actually means is that SLIP MSGID processing is not
done when a branch entry WTO is issued while running on a super
FRR stack ( anything other than the normal FRR stack). IOS050I is
issued out of the I/O interrupt handler, which runs on the I/O
super FRR stack.
Instead of skipping SLIP completely in this case, it would
probably been a better choice to do SLIP processing when the message
is reissued on the local system. The SLIP processing would then
by asynchronous with respect to the issuer of the branch entry WTO,
but that would be better than nothing.
You can trap the IOS050I asynchronously as follows:
Add
IOS050I,SUP(NO),USEREXIT(IEAVTSLM)
into to your MPF parmlib member and then SET MPF=xx
Then
SLIP SET,A=SVCD,C=06F,RE=4,ID=MSG1,END
This technique is described in the IBM-MAIN archives
of Dec 18, 2001 - Dec 19, 2001 with the subject
Re: SLIPing on a WTO
Jim Mulder z/OS System Test IBM Corp. Poughkeepsie, NY
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