Thanks all for the help.   My second question:

> 2. The macro IEFZB505 has two options for the keyword parameter LOCEPAX in
> unauthorized mode:  "YES" and "VR2".  When should either be used?

is still unanswered. Anyone have a clue?

On Sun, 25 May 2025 at 14:59, Seymour J Metz <[email protected]> wrote:

> SWAREQ works whether SWA is above or below.
>
> --
> Shmuel (Seymour J.) Metz
> http://mason.gmu.edu/~smetz3
> עַם יִשְׂרָאֵל חַי
> נֵ֣צַח יִשְׂרָאֵ֔ל לֹ֥א יְשַׁקֵּ֖ר
>
>
>
> ________________________________________
> From: IBM Mainframe Discussion List <[email protected]> on behalf
> of Steff Gladstone <[email protected]>
> Sent: Sunday, May 25, 2025 7:18 AM
> To: [email protected] <[email protected]>
> Subject: Re: SWAREQ
>
>
> External Message: Use Caution
>
>
> Okay I should have asked at what point was the SWA=ABOVE option available.
>
>
> But an additional question would be as follows:  Will SWAREQ still work if
> SWA=BELOW?  Does the SVA mechanism still work in that case?
> If not, how do I test to determine if JSCBJCTA is an SVA token or a 24-bit
> pointer?
>
> On Sun, 25 May 2025 at 13:09, Steff Gladstone <[email protected]>
> wrote:
>
> > A couple of questions:
> >
> > 1.  At which release of z/OS did IBM move the JCT above the 16M line and
> > initiate the use of SVA's?   We have a couple of installations at
> > earlier releases and we want to make sure that the SWAREQ macro won't
> fail
> > there.
> >
> > 2. The macro IEFZB505 has two options for the keyword parameter LOCEPAX
> in
> > unauthorized mode:  "YES" and "VR2".  When should either be used?
> >
> > Thanks,
> > Steff Gladstone
> >
> >
>
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