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Your comment is mostly right.   However, there are times when features
are allowed back.   From the precompiler standpoint, enhancements where
the precompiler is finally supporting a feature that has been in the
compiler for a while will be allowed to a previous release.
For the precompiler enhancements that are because of a new SQL statement
or a new compiler feature, those will not be allowed to a previous
release.

So, you can change your source on v5r4 to have SQL statements
in free format and precompile it with TGTRLS(V5R3).  The program will
run on v5r3.


-----Original Message-----
From: Jeff Young [mailto:cooljeff913@xxxxxxxxx]
Sent: Tuesday, March 21, 2006 10:36 AM
To: Midrange Systems Technical Discussion
Subject: Re: Compiled Programs Under V5R4 - Work in V5R3?

The only way to make the progam backward compatible is to compile with
TGTRLS(V5R3).  Unfortunatly, this will have the effect of not letting
you use any features not supported by the V5R3 compiler .... including
Free Format SQL.



Michael_Schutte@xxxxxxxxxxxx wrote:
  I can't give you a definite answer to your question, but I would
imagine
that compiled objects would not be backwards compatible much like not
being
able to open a Word 97 document on Word 95 without losing the
formatting.

Michael Schutte
Work 614-492-7419
email michael_schutte@xxxxxxxxxxxx



"Brian
Piotrowski"
oeparts.com> "Midrange Systems Technical
Sent by: Discussion"
midrange-l-bounce
s@xxxxxxxxxxxx cc

Subject
03/21/2006 09:32 Compiled Programs Under V5R4 - Work
AM in V5R3?


Please respond to
Midrange Systems
Technical
Discussion
nge.com>






Hi All,



Within the next month we will be taking delivery of a brand new 520E to
replace our aging 720 box. I just finished reading an article on IT
Jungle that v5r4 will now allow SQL statements in free-form (about
time!).



Now the question - our old 720 will be demoted to a DRP box. I know
that V5R3 will be the highest version of the O/S I can put on this box.
My question is if we put V5R4 on the 520 and V5R3 on the 720, will
compiled programs still work on V5R3? I'd like to move the code over to
the free form SQL, but I will not do it at the cost of having the
programs fail on the DRP machine if the time comes that we need to use
it. I assume I will not be able to modify code on the 720 box if we
move to v5r4, but is that the only limitation?



Any opinions would be appreciated.



Thanks!


Brian.



-=-=-=-=-=-=-=-=-=-=-=-=-=-

Brian Piotrowski

Specialist - I.T.

Simcoe Parts Service, Inc.

PH: 705-435-7814

FX: 705-435-6746

-=-=-=-=-=-=-=-=-=-=-=-=-=-



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