NetBackup can be really ornery when checking versions. Try this command:
[root@master ~]# bpgetconfig -s
hpuxhost.bck.mrll.com -A -L
Client/Master = Client of
master.bck.mrll.com
NetBackup Client Platform = HP9000-800, HP-UX11.11
NetBackup Client Protocol Level = 6.5.4
Product = NetBackup
Version Name = 6.5
Version Number = 650000
NetBackup Installation Path = /usr/openv/netbackup/bin
Client OS/Release = HP-UX B.11.11
Cipher =
Patch Level = 6.5.4