from Admin guide:

Starting a scheduled clone job manually

You can start a scheduled clone job at any time without affecting the regularly

scheduled start time.

To start a scheduled clone job manually:

1. From the Administration window, click Configuration.

2. In the expanded left pane, select Clones.

3. Right-click on a clone resource in the right-pane and select Start.

but from command line?

NetWorker 7.6.4.3, Windows 2008 R2, LTO5

thank you

freeneet