Many thanks again Syd. There is a problem within the routes routine which is deleting routes from the routes database. Airnav are aware of the problem, however Dev is unavailable due to other commitments for around 2 weeks and he is the person who is able make the required changes to the routine.
In the meantime, in addition to entering the data into the Airnav routes database, I am keeping a seperate database of the routes. When Dev is available, and fixes the routes routine problem, all routes in my database will be re-entered to ensure those which have been deleted are replaced.
It is a bit of a frustration but the work will not go to waste so please keep forwarding them
Many thanks
Alan