Do your public/storage volumes have different geometries?  (That is,
does the system select different blocksizes?)

I notice that the files in question are RECFM=VB.  A *very* long time
ago, with a COBOL compiler that Zeus used in grade school, you had to be
careful writing variable-length records (with embedded ODOs).  Before
performing a WRITE FROM you had to initialize the receiver's DEPENDING
ON field, else the implied group move would incorrectly calculate the
length of the receiving record.

The reason I bring this up is that a program that overruns the logical
end-of-record may or not S0C4, depending on blksize / blocking factor.

Just something to think about.  You said you didn't have access to
source code, so all this is mere speculation.

-- 
David Andrews
A. Duda and Sons, Inc.
[EMAIL PROTECTED]

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