Juergen

When Conrad first posted, I noted it was a VTAM topic so I checked the 
Communications Server SNA Customization manual.

> why is it not allowed to use WTOs in DSME-Exit?

You will find the following line in the "Design requirements" section for each 
exit:

<quote>

Do not issue any SVCs if this exit routine is running in SRB mode.

</quote>

Well, now, the question now arises as to whether or not the exit runs in SRB 
mode, does it not?

It turns out that only the USERVAR - most of the time - and DSME exits are 
documented as running in SRB mode.

Thus Conrad has done his "due diligence" with respect to the DSME exit.

> We bought an exit from IBM and it uses WTOs.

If this is an USERVAR exit or a DSME exit, you have bought defective goods. 
Perhaps you can reclaim from your credit card company!

> So it (WTO) can be used.

Not officially if the exit you acquired is the USERVAR exit or the DSME exit.

-

Actually, long ago when I had my education systems with which to play, I 
wrote up all of the VTAM exits which existed at the time. Mostly what I did 
was extract the information which is presented to the exits. Initially I used 
WTO but that was such a mess on the console that I changed all the WTOs 
to WTLs ("write to log" - is that an official macro or did I just create one 
wrapped around the SVC?).

I believe I must have indulged in this exercise before the DSME exit was 
available and so I can't comment on whether or not it might work - but 
unofficially - and certainly not in a *production* system - if you want to be 
supported ...

Chris Mason

On Sun, 28 Mar 2010 23:58:49 -0500, Juergen Keller 
<juergen.kel...@deutsche-boerse.com> wrote:

>hello Conrad,
>why is it not allowed to use WTOs in DSME-Exit? We bought an exit from IBM
>and it uses WTOs. So it can be used.
>regards Juergen

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