> Remember the merge order for OPEN is program, DD Statement, and DSCB.



If memory serves me right, the JFCB is built by allocation long before OPEN. It 
contains a) the dcb parms from the DD (or SVC 99), and b) data from the DSCB 
for all fields not specified on the DD. b) happens only for existing data sets, 
of course.
--
Peter Hunkeler


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