Every time you recompile (without any modification) a program there's a
potential change.

In a migration from Cobol V4 to V5 there're some enhancements in terms of
performance that can be interesting as IBM do promise CPU cycle reducing
specifying the right ARCHLEVEL.

As long as IBM states there's not a change in the behaviour of the
application and every product (APA, Strobe etc.) would not notice any
difference, the case you don't want to face a massive recompilation the
product may be useful. A business case and a light risk analysis are
necessary.

Best regards.
Massimo

2015-11-23 15:49 GMT+01:00 Charles Mills <[email protected]>:

> Very quick answer -- I have been through the presentation but am not an
> expert and have not used.
>
> Think of it as a compiler. Most compilers are source code in, object code
> out; it is object code in, object code out.
>
> You would not do it to programs that you recompiled in the conventional
> way -- no benefit. It is for "lost the source code, not sure if the source
> code matches what we run in production" type situations -- of which
> apparently there are myriad, enough to justify a product.
>
> Charles
>
> -----Original Message-----
> From: IBM Mainframe Discussion List [mailto:[email protected]] On
> Behalf Of Lizette Koehler
> Sent: Monday, November 23, 2015 6:39 AM
> To: [email protected]
> Subject: Re: Interesting Article About Cobol
>
> So just looking at the PDF diagram, it looks like you have to run your
> load module thru the ABO and create a new load module with the same names.
> So it will "do stuff" to your current V3 or V4 COBOL Module to make it
> better.  So the new old module is a hybrid of the old with ABO adjustments.
>
> And then any time you would recompile your program, you would need to run
> it through ABO again.
>
> Seems like some extra steps.
>
> Maybe there are those on this list that might be using ABO and can provide
> some insight.
>
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