command "tmsh save sys config file" not supported (BIG-IP v10.0.1)

Hello

The following command is not working on our BIG-IPs (v10.0.1, Build 283.0, Edition Final):

     tmsh save sys config file mybackup
    Syntax Error: "config" unexpected argument

    (tmos) save ?
     Components:
       base-config  Saves only the portions of the running configuration that reside in these configuration files: /config/bigip_base.conf and /config/bigip_sys.conf.
       config       Saves the running configuration to the configuration files.
`

In change, on our BIG-IP (v11.2.1,Build 283.0 Edition Final) it is working well:

`          tmsh save sys config file f5.conf
         Saving running configuration...
         /var/local/scf/f5.conf
         /var/local/scf/f5.conf.tar

How can I create an scf backup on a BIG-IP v10.0.1? (to copy it to a ftp server)