The short answer is no one can say.
For OS-related and non-packaged software, I'd recommend reading the Memo to
Users for all releases involved to look for possible problem areas for your
customer. That would be V4R5, V5R1, V5R2, V5R3, and V5R4. At one V5
release, for instance, spool file support changed to allow more than 9999
spools per job; that would have broken an app we were using without getting
a vendor patch.
For software from ISVs, I'd suggest simply calling them to ask. I wouldn't
be surprised either way if nothing was needed or if a software patch was
required. After all, this upgrade is jumping 5 OS releases.
There are possible side issues as well. For instance, is there any
integration between Windows and their iSeries? NFS mounts to Unix system or
other uses of the IFS that go beyond just that system? Any Client Access
usage that might be affected, like a Windows Server using CA to read DB2
files for whatever reason or maybe Crystal Reports accessing iSeries data?
Things like these may work just fine on an upgraded OS but could need
reconfiguring to work right post-upgrade.
Any PCs/servers using Client Access will have to be upgraded. IBM supports
Client Access releases talking to OS/400 releases at N+/-2 (
http://www-03.ibm.com/systems/i/software/access/connections.html ); i.e.
V4R4 CA would talk to V4RF5 and V5R1 OS/400 systems and OS/400 V5R4 will
talk to CA going backwards on V5R3 or V5R2. There's no overlap in supported
releases so any systems running Client Access will have to be upgraded.
Also, since they're running a very old version of OS/400, are they also
running very old versions of Windows on their desktops? Windows versions
prior to XP may be troublesome (I'm not sure).
There's also the hardware side of things. They're getting a new system, and
that's fine. Are their any components or peripherals from the old system
that they want to carry over? Tape drives, twinax lines, etc. Make sure
the hardware is supported on the newer system and that appropriate IOAs were
ordered.
On Mon, Aug 16, 2010 at 2:15 AM, Chamara Withanachchi
<chamaraw@xxxxxxxxxx>wrote:
Dear All,
One of our customer is buying a new box with V5R4 and he is in V4R4. My
question is can his application be run without any compilations.
--
Regards,
Chamara Withanachchi
IBM Certified Power System Expert
RPG Programmer
(owner of www.rpgiv.info)
WWW.RPGIV.INFO
Mob: +94 77 1678646
chamaraw@xxxxxxxxxx
i want to be future ready. i want control. i want an i.
--
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