for the 25 Tapes Volumes that should be moved into VAULTLOC "X"
the following command should be executed.
// EXEC DYNCAT,SIZE=128K
ALTER 'MONTHLY.BACKUP.D2C' VOL=D00003 VLTL=X PERM=YES
ALTER 'MONTHLY.BACKUP.D2C' VOL=D00002 VLTL=X PERM=YES
And so on for all the 25 Tape Volumes.
The 25 ALTER statements always need ONLY the FIRST Dataset from a Multifile Dataset chain included.
The VOL= statements has to included the Tape Volser number which should be moved to VAULTLOC "X"