But the exit points 'count' as program DCBs ... as they execute first
and override what is in the JCL. I don't check "Using Data Sets"; but
that is how things were in the days of MVS OS/VS SP1 (1985): if things
have 'changed' since then, so be it.
Tom Marchant wrote:
On Tue, 26 Jul 2011 22:47:16 +0100, CM Poncelet wrote:
When opening for output, the DCB used is (a) the one
specified in the program; (b) the one in the JCL; (c) the one on DASD -
in that order of priority.
Correct, but incomplete. There are exits points that can alter the DCB
attributes too.
When opening for input, the priority order is
reversed (DASD, JCL, program).
I don't think so, and Using Data Sets seems to say otherwise.
Can you cite a reference?
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