CLI - data copy

i use Netvault 8.6.1 with RHEL5.5

i have 2 VTL and a physical library (Quantum I40).

My VTLs are nearly full, and i want to move data from VTL to I40.

What is the best way ? data copy ?

i have spent many time to try use data copy in CLI.

But, i need some help to find the correct syntaxe for the selection.

[root@xxx util]# ./nvmediadetails -label PK0069 |grep 1675

    P7-SVPAIE-201108 (Saveset 1675) 11:05 29 août 2011

[root@xxx util]# ./nvsetcreate  -setname DataCopy1 -type BS -client xxx -plugin "Data Copy" -include "Backups/yyyy/File System/P7-SVPAIE-201108 (Saveset 1675) 11:05 29 août 2011"

Failed to add selection 'Backups/yyyy/File System/P7-SVPAIE-201108 (Saveset 1675) 11:05 29 août 2011'

thanks