I am an absolute novice, having used the devloper tool for the first time.
However, I managed to create sn airport scenery without error messages. The reason for my action is that my “home turf”, Reutte-Hoefen (LOIR) has a grass runway in the default scenery whereas in reality it got a hard surface.
Now I am happy with the result but need to know (sorry, I am a dummy!) how to make this change permanent, i.e. it is loaded at every start without having to build the scenery in Dev mode.
Once you build
In your project,.inside the Packages folder there is another folder that you can plop in community so you can enjoy your work without opening the project in dev mode