Our first task is to allocate PDS libraries to ISPF and launch the Data Manager Main Menu in an ISPF environment. To do this, start an ISPF command prompt; then execute the following command:
TSO EXEC 'URADAR.TS21WRK.CLIST(MFDATA)'
In this example, URADAR.TS21WRK is the name of the PDS library that contains the MFDATA member.
This launches the Data Manager Main Menu: