When I tried to enter the departure program when I'm using the Antonov 225, I typed the takeoff and landing airport and pressed the Program button in the GNS530. I chose to set the departure procedure, but after clicking enter, it did not give me the departure program selection screen, but told me that there is no relevant departure program, but this is not NAIP airport.

Heya!

I found that it is easiest to just use the insim worldmap for route planning. You can insert your simbrief flightplan there if you want, or just use the default route selector. The selected route from there will be ported into the GNS automatically 🙂