This utility is not a standalone utility. It must be called by an application using one of the following methods. See the CTTGVLD sample in the IOA SAMPLE library.
Using a Call Command
CALL CTTGVL,(data_set,jobname,stackid,volser,label),VL
Using a Link command
LINK EP=CTTGVL,PARAM=(data_set,jobname,stackid,volser,label),VL
CTTGVL – User Interface to Stacking Facility