Dropping HFZCNF00 parmlib member data set specifications

It is possible to drop all data set specifications for a given DDname specified in the HFZCNF00 parmlib member by using the special data set name, -DROPCNF-.

If, for example, the HFZCNF00 parmlib member contained:

DataSets(HFZLCOB(FRED.L1,FRED.L2))

and an HFZOPTS user-options file contained:

DataSets(HFZLCOB(FRED.L3,-DROPCNF-,FRED.L4))

then the final logical concatenation of data sets for the HFZLCOB DDname would be:

HFZLCOB DD DISP=SHR,DSN=FRED.L3
        DD DISP=SHR,DSN=FRED.L4

Note that the -DROPCNF- data set name can be specified anywhere that a DataSets option can be specified. It can, however, not be provided by an Analysis Control user exit.