Failed to load module on SITL

I believe this is basic but i’m new to this so I can really use some help…

I’m using ubuntu 16.04 and i followed the instructions for the installation of ardupilot SITL ( Caleb Bergquist drone programming tutorial)

when i try to lunch arducopter simulation (sim_vehicle.py --map --console) i get the following error messages :

Faild to load module: No module named terrain.Use ‘set moddebug 3’ in the MAVProxy console to enable traceback
Faild to load module: No module named console.Use ‘set moddebug 3’ in the MAVProxy console to enable traceback
Faild to load module: No module named map.Use ‘set moddebug 3’ in the MAVProxy console to enable traceback

obviously, map and console did not open (full terminal screenshot below).

appreciate any help you can provide.