[Konstantinos]

I didn't notice it before:

pawn Код:

c1name = "Slot 1: %s (Stored)", GetVehicleFriendlyName(c1);

What your code does is set c1name to "Slot 1: %s (Stored)" and then call GetVehicleFriendlyName without storing the output returned anywhere. You need to format the text for it to work.