As several people have suggested, adding MODE=HOME does the trick. I thought it 
was not necessary
since I had specified JOBNAME, but apparently not. John Welke sent me this 
illuminating private message:

"I saw your question on IBM-MAIN about SLIP IF not working and as I only 
subscribe to the digest I thought it easier if I reply directly to you.  I 
encountered a very similar problem many years ago and the trick was to include 
“MODE=HOME” on the SLIP trap.  This is alluded to in the reply from Harris 
Morgenstern from IBM (shown below).


Date:    Wed, 8 Jun 2022 13:51:49 +0000
From:    Harris Morgenstern [email protected]
Subject: SLIP IF not working

MVS System Commands discusses this:


PVTMOD/PVTEP without JOBNAME/ASID and MODE=HOME:
This consideration pertains to the PVTMOD and PVTEP parameters when specified 
in an IF or
SBT PER trap for a module that was not loaded with GLOBAL=YES. PVTMOD and PVTEP 
are
used for monitoring execution in modules that reside in private storage. 
Whenever possible,
specify JOBNAME or ASID, and MODE=HOME, when you use PVTMOD or PVTEP in order 
to avoid
performance impact due to PER interrupts occurring within the range of the 
specified private
load module but in another address space. Using this parameter combination 
communicates the
following information:
- JOBNAME or ASID tells SLIP to match only when the PER interrupt occurs under 
the indicated
job.
- MODE=HOME tells SLIP to match only when the PER interrupt occurs while 
executing in the home
(dispatched) address space.
- JOBNAME or ASID in combination with MODE=HOME tells SLIP to set the PER range 
only when
the private module is loaded into storage in the specified address space. If 
this parameter
combination is not specified, SLIP sets the PER range the first time the 
private module is loaded
into storage, regardless of which address space performs the load."

So now we know! I am not sure the above extract is in the current version of 
System Commands; I
couldn't find it in the description of the MODE parameter.

Thanks to all.
Robin

-----Original Message-----
From: IBM Mainframe Discussion List <[email protected]> On Behalf Of Ed 
Jaffe
Sent: 09 June 2022 11:34
To: [email protected]
Subject: Re: SLIP IF not working

On 6/8/2022 12:03 AM, Robin Atwood wrote:
> I strongly suspect the problem is caused by the PVTMOD parameter. 
> Normally I just specify a RANGE but this SLIP must be sent to a customer, so 
> that will not work.

In addition to PVTMOD=, try also specifying MODE=HOME.


--
Phoenix Software International
Edward E. Jaffe
831 Parkview Drive North
El Segundo, CA 90245
https://www.phoenixsoftware.com/


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