>We recently attempted to replace our IEFACTRT routine in our production
>platform using TMON..

And how do they do it these days? Do they use the interfaces CSVDYNLPA and
CSVDYNEXIT (or whatever that one's called)? Or do they do it the way it was
done before these interfaces became available - by altering addresses in MVS
control blocks?

>Well, as luck would have it, our system appeared to freeze up. We had been
>able to do this replace function successfully on our test LPAR.

How did you determine that the iefactrt change was the reason for the
freeze? What exactly does your actrt do? For which types of work (TSO, STC,
JES)?

>Anyone care to comment on this type of a replacement in dynamic LPA...
>hazards, potential problems?

As long as I have used the MVS commands utilizing the dynamic interfaces I
never had any problem (other than code problems in the exit itself - which
has nothing to do with how they were loaded/defined). It took me some time,
though, to really understand the relationship between sys.iefactrt,
sysstc.iefactrt, systso.iefactrt and sysjes.iefactrt and how that interacts
with the module that gets called for each dynamic exit.

Regards, Barbara Nitz

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