App_update 258550 (failed "No Subscription")

Can anyone help me with this?, Trying to get the server files with ‘steamcmd’ and its just not letting me download.

[editline]6th September 2014[/editline]

Note just found the easy fix:

1: Login as ‘Anonymous’
2: app_update -beta experimental
3: ???
4: Profit.

Are you doing this from a Steam account that doesn’t own Rust?