Fs9 has not caused me any seroius problems over the last few years and I'm very happy except for one nagging problem. When flying over the paris area, I get terrain dll errors. I have the Aerosoft Mega Airport Paris CDG installed and looked for solutions on their site and was told that was not an issue reported by other users. This is the ONLY aera in Fs9 where I get these errors.What brought me to this forum is when I uninstalled CDG, I still get the terrain dll errors when I fly over paris. I'm about ready to make the move to FSX but would like to know what is causing these errors because I will be installing the FSX version of CDG.ThanksAlex

I would suspect that you have a duplicate AFCAD file for one of the Paris Airports, probably CDG. I would look for that first.