The problem is that I enter the airway and the waypoint in the FMC, however the FMC show a message of "Invalid entry", I have checked the flight chart and the waypoint is included in the airway I selected.So I have to enter the waypoint before my desired and DCT to my waypoint.For example:OTR20 A (invalid entry)but OTR20 B(point before A)DCT AThis one is OKIs that the problem of Cycle 0611 I am using. (someone sent it to me as a installation pack)

The FMC only admits entering airways between three or more waypoints.If you try to enter an airway track only between two waypoints you get that INVALID ENTRY message.Well, this is my experience.Jose Luis

Try putting your next waypoint in on the right hand side so that the right hand side automatically shows DCT (Direct to) then overwrite the DCT with your airway - usually works for me.PS don't forget to sign your name at the bottom of your posts