Assume that you have a test system zone named MVSTST1, and you have just performed a full MVS™ system generation to create a new set of libraries, and then you have done the processing needed to set up a new zone, MVSTST2, representing the new set of target libraries (for examples of setting up a target zone after system generation, see Examples). You are now ready to delete the old target zone:

SET      BDY(MVSTST1)       /* Process MVSTST1 tgt zone.*/.
ZDEL     TZONE(MVSTST1)     /* Delete it.               */.