I just opened a base at Minneapolis/St Paul, and I wanted to move an aircraft flying alliance routes to Gary/Chicago, Manchester-Boston, and Cleveland-Burke from JFK, but when I tried to, i got the following message:
Route closure not allowed.
Existing route is the only connection between two or more other routes flown by this plane.
There's still another aircraft flying between AMS and JFK, so I have no idea what this means. I've also let another plane fly from MSP to Gary, Manchester and Burke. Can anyone help me?
?