I have just completed a flight from Zurich to Dusseldorf, using the A320nx and VATSIM. In preparation for the flight, I set up a flight plan in SimBrief, then transferred it to the mod’s MCDU via Navigraph (I am still having trouble going directly from SimBrief to the A320nx). Once in the air, the MCDU and the graphical display showed that I was following my flight plan, but the controller on VATSIM notified me that I was way off my filed plan (and not too kindly, I might add). When I checked Navigraph, it became clear that he was correct. I completed the flight by using my Heading Mode and jumping back and forth to Navigraph to make sure I was on the proper course. I would add that this happened to me once before on a flight in the United States.
Has anyone else encountered this problem? And does anyone know how to fix it?