machinegun and bots

[sg.Pepper]

Hello,
in console is:
ERROR[jv_map_ai:action_go_to_routed]: location is NIL, task: machinegun,
can someone explain to me what is wrong? $route name I have set on mg_node, is it right?
And yet one think:
Can someone explain this error?:
Script error: comand 'thread' aplied to NULL listener.
Thank you all

[jv_map]

Are you sure all mg-42s in your map have a mg_node with corresponding #set key?