How do I tell if a PDS or PDSE has no members?

[Ray Overby]

I am writing an assembler program. I have obtained the format 1 dscb for 
a data set. Is there a way to tell if the PDS or PDSE is empty by using 
the format 1 dscb?  If not, how do you tell if a PDS or PDSE is empty?

Ray Overby
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