SIM MANIACS, when I reccompile all the necessary data using ttools, it saves and replaces the original traffic.bgl and renames it Traffic_Original.bgl and generates one that is called traffic.bgl. Is it supposed to do that? I am definately sure that it is my traffic.bgl that is causing the limitations of some of my commercial aircrafts to not appear at my airport and just the default ones. Does anyone have more experience in manipulating the traffic.bgl file? I am absolutely sure that 's my problem.