As I reported earier the build A 10 threard the main quest is borken when you try to stop the ammunition ship at St, Pierre. When you go to the port from your ship, you get a runtime error. Playing a new game it happened again. I am sure it is not in the location files because I successfully landed and went to the port in the game before I triggered the main quest at Barbados. So.... I think the problem is in the quest.