Have not done much VSAM coding, hence the questions.  Have an opened ACB in 
31 bit storage.  Looking at a dump immediately after a successful OPEN for the 
dataset.  TCBDEB points to a DEB where the chain from the DEB to the JFCB is 
correct(DEB extention to DSAB to SIOT to JFCB)...it's the dataset just opened.  
At x'14' into the DEBBASIC is a pointer to the ACB, but the field in the DEB is 
called  DEBECBAD.  The DEBDCBB field is filled in, but don't recognize what it 
points to. Are the differences between VSAM and non-VSAM DEB structures and 
associated control blocks documented somewhere?

    --Dave Day

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