OPNPAYM file problem

We are having a problem with the OPNPAYM file in AP since Monday.
Doing the Vendor Open Invoices Inquiry we are getting CPF5149-I/O error
on OPNPAYM on the SETLL operation.

I sent Infor a dump and joblog and they can't find the problem.
I just spent most of the morning with the help desk and we checked
the file for invalid data, copied the data out then back into the file and
quite a few other things. I even created the OPNQRYF from the clp (AMAP9A)
and put it in a test program and tried to do a CPYFRMQRYF and that gave me
an error message.

This program worked fine last week for us and the only change we have made
is to upgrade from V5R3 to V5R4 this past weekend.
We have not made any modifications to this program.

Has anyone else run into a problem like this after putting on V5R4?
Or have had a problem with this file?

Thanks,
Brenda Trisko

PS Our AP person just called me and she can't do a check reversal either.
Getting message CPF4132 on OPNPAYM.

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Brenda Trisko
iSeries 400 Systems Programmer/Analyst
Douglas Machine Inc.
Alexandria, MN
(320) 762-6291