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Jon,

No particular reason for the definition being the way that it is. Only that IBM's examples show the definition in this way. (http://www.ibm.com/support/knowledgecenter/ssw_ibm_i_71/rzasc/sc092507346.htm%23hcndhd - see the CommArea definition)

Keep in mind that the pointer's value is assigned in the failing program and it is NULL. The condition handler is successfully receiving the NULL value.

Also that this process is and has been in use for years.

I've provided a stripped down example to IBM with the PMR and they were able to duplicate the MCH3601 error.

Steve Needles


-----Original Message-----
From: RPG400-L [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Jon Paris
Sent: Monday, May 16, 2016 2:16 PM
To: Rpg400 Rpg400-L <rpg400-l@xxxxxxxxxxxx>
Subject: Re: %ADDR() in a DS is not resolving to the correct value.

CA_pPsds appears to be DEFINED within a DS. Any particular reason for that?

If, for example, a copy at the DS level took place in the code that would leave the value in the pointer intact but nullify it as a pointer. Any chance that is happening somewhere in the code?

By “copy” I include the DS being passed as a parm with Const where the sending an proto definitions are not a 100% match. That would cause a copy to be made prior to the call.


Jon Paris

www.partner400.com
www.SystemiDeveloper.com

On May 16, 2016, at 2:26 PM, Needles,Stephen J <SNEEDLES@xxxxxxxxxxxxxxxx> wrote:

The service program *IS* the condition handler.

Running the program; not the tame one, but the feral one; the pointer...

D CA_pPsds * INZ(%ADDR(PGM_PSDS))

Has this value: CA_PPSDS = SPP:*NULL

It should be populated at this point as we are into the c-specs at this point. Nothing has had an opportunity to step on the value either.

I'm stripping things to the bone for the PMR. I'll post more stuff as I carve away the noise. Perhaps I'll stumble on something the developer did to make this fail.

The register is registered and de-registered with each program execution.

The call stack is fine...no contamination. It will fail in a pristine job.

Steve Needles


-----Original Message-----
From: RPG400-L [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of
Hiebert, Chris
Sent: Monday, May 16, 2016 11:58 AM
To: rpg400-l@xxxxxxxxxxxx
Subject: RE: %ADDR() in a DS is not resolving to the correct value.

-- I don't think that the *SRVPGM angle has anything to do with the error as my tame test program works just fine.

Steve are you saying that the Service Program is *using* the condition handler?
Or are you saying that the service program *is* the condition handler?

Do you unregister your condition handlers?

Could there be in issue where the condition handler is being triggered for a program that no longer exists on the call stack.
In which the previously pointed to PSDS is no longer allocated?


Chris Hiebert
Senior Programmer/Analyst
Disclaimer: Any views or opinions presented are solely those of the author and do not necessarily represent those of the company.
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