>Yes, this is the JCL I found, but this only targets some PSA areas and
>not with x'FF' and x'4F' as you said.
The FF and 4F come from the DIAG traps. And I think I copied the JCL from 
share presentation 'bit bucket 29'. And believe me, when I saw a PSA 

>Furthermore, the mentioned traps are not in my Inititalization and
>Tuning Reference, nor can I find them with IBM. Where did you get this
>wisdom?
Of course they're not documented!!!! (One of Ed Jaffes pet peeves...) Look 
for 'dirty getmain' in the archives. A lot of those diag traps were at one time 
or 
another mentioned in other bit buckets. And were discussed at ibm-main. 

I tend to keep these things in a folder, to be whipped out later. Once you set 
them via DIAG, 'D DIAG' dutifully shows them! 

But officially they're 'unsupported'. Which is why I said to use a test system 
to 
try. Which is why it is so easy for vendors (like Beta Systems) to refuse to 
fix 
things uncovered by those traps. And if someone has the bug and did not 
have the traps on, the problem is most likely not reproducible and hence will 
not get fixed, because the 'right' doc isn't there.
Barbara

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