At the very end of this long Mission you are supposed to decouple the 37 coaches and drive the two locos back to a point "behind the Sand patch junction". This point is just past a Red Signal. Crossing the Red Signal causes the scenario to fail. Calling for dispatcher does result in no response in both the immersive and the classic Control Mode. Just past the Red Signal is another Red Signal and a train standing and waiting there. I waited for 30 Minutes at the Signal to maybe turn Green. In conclusion the scenario is not finishable. Frustration After 2hr of 15mph snail Speed.