🚀 go-pugleaf

We are having a troublesome and mysterious problem in VM.
We have an exec consisting of many steps, of which two
consecutive steps are fortran programs that call a cobol
program via an intermediate program written in assembler.
The reason for this complicated structure is the need to
access a key-sequenced VSAM file, which is not possible in
Fortran.  This exec has been working faithfully in production
for over 15 years, some tens of times each day.  In the two
steps, the Fortran programs are completely different, but
the assembler and cobol programs are identical, i.e. the
load statement refers to the same text files.
In order to enable this old system to get over Jan 1, 2000
successfully, we are building a parallel system based on
identical logic.  We have a parallel VM machine, a corres-
ponding VSAM file and parallel programs.  Our problem is
that in the new system, we frequently (but randomly) get a
0C4 abend in the second of the two steps.  The problem is
not with the input data, as a rerun with the same data almost
always succeeds.
We would be most grateful for any suggestions.

Suzanne susane@elal.co.il
ELAL Israel Airlines