FTP Strange One - V5R1

I've got a strange one that began after installing V5R1 a few weeks ago.

In brief, we have a PC running DOS 6.22 that receives orders from our
sales reps laptops.  The PC is connected to the AS/400 via ethernet.
These orders are put into a text file ("TORDER.DAT") and FTP'ed to the
IFS.  Immediately after the FTP PUT command, the PC issues a SBMJOB
command to the AS/400 that processes these orders.

The first thing the submitted job does is a RNM of "TORDER.DAT" to
"Jnnnnnn.DAT" where nnnnnn is the AS/400 job number.  This happens at
least 30 times _per day_.  About 2-3 times per week the RNM will fail
with CPFA0A9 Object not found meaning TORDER.DAT does not exist.  If I
look at the IFS it is indeed not there.  This would likely indicate to
me the FTP PUT command failed.  I don't know any way to capture at that
PC if the PUT has failed and I'm never there to see it.

Can anyone think of something that may have changed with V5R1 that would
cause almost random FTP failures?  Changing from V4R5 to V5R1 is the
only thing different, so I'm presuming that is the first place to look.

Thanks.

--
Jeff Crosby
Dilgard Frozen Foods, Inc.
P.O. Box 13369
Ft. Wayne, IN 46868-3369
260-422-7531

The opinions expressed are my own and not necessarily
the opinion of my company.  Unless I say so.