Netbackup 7.6.1 installation fail

Hi ;

currently i installed netbackup 7.6.1 on Solaris 10 SPARC server , and when i run ./install Script the following message appears :

root@netbackup # ./install
Usage: dirname [ path ]

Symantec Installation Script
Copyright 1993 - 2014 Symantec Corporation, All Rights Reserved.

Choose an option: [1 - 0]: 1
ERROR: 1 is invalid input. Please try again.

Choose an option: [1 - 0]: 0
ERROR: 0 is invalid input. Please try again.

please advice ;

thanks
Deyaa