If you don't have the jetway selection menu in GSX after selecting Boarding/Deboarding, it caused by one of these issues:
- The communication with SODE has been interrupted for some reason. You should see a warning message saying that. You might try to use the "Reload All" menu option from SODE, sometimes it helps.
- The SODE communication is working normally, but SODE cannot solve the animation needed to reach that airplane door. GSX will first ask SODE if that jetway can be solved, and if it can't, it will then display a message saying "No jetway can operate at this position"
The most likely reason for a jetway not being solvable, is that you are parking too close or too far away from it, or your plane door's are too high to be reachable.