Thanks guys. What really happens to me is that the FMC asks me for a lot of data I have to introduce. And mainly everytime I don´t know the wind direction and speed at my cruise altitude, as well as the air temperature... etc. So possibly I didn´t explained myself completely; I think I can manage to use the FMC, but as I have some lack of data, It´s not possible to use it properly. What do you do when you introduce the parameters (if you don´t know them all)? Sometimes I´ve tried to invent them but the result isn´t satisfactory.
Any advice, please?:%