Shmuel Metz (Seymour J.) wrote:
In <4e38932c.2030...@bcs.org.uk>, on 08/03/2011
at 01:15 AM, CM Poncelet <ponce...@bcs.org.uk> said:
... but open for output, followed by write, works - whereas open for
input, followed by read, doesn't (it fails with an "I/O ERR"): that
is a fact, not an opinion.
No, it is not a fact. It is a fact that you can cause an I/O error
with an incorrect BLKSIZE. It is false that you always get an I/O
error when you override dataset attributes on input.
But I should get *no* I/O error at all on read if the DCB precedence
rules for output apply also to input, as is asserted (... not by me).
So unless the "I/O ERR" is actually the desired outcome, it is an
error.
A user error.
If the dataset is thought to be in error, raise a PMR with IBM.
Don't create a PMR for a user error.
Otherwise it is the program's merged DCB that is
in error - which is what I am saying.
That isn't what you have been saying. You have been confusing open
with read and confusing the DSCB1 with the dataset itself.
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