confused error message when appropriate router_mod is not implemented yet

[bachng2017]

When an unsupported (not yet implement) command is used, the error message is confused. Need more clear error message or a an auto-fallback mechanism

renat_server  | ------------------------------------------------------------------------------
renat_server  | 02. Get BGP neighbor                                                  | FAIL |
renat_server  | UnboundLocalError: local variable 'mod' referenced before assignment

[noahrobin1]

I actually ran into this today. Underlying cause was that I had done something silly, but did take some chasing down to figure out the cause. Which I did, so I'm not currently seeing a /problem/; just wanted to mention that I'd run into this in case you didn't know it was being seen in the wild.