I took a look at what the tm.log registers for the airports from the tool:
--------------------
(1) ERROR messages:
I have ERROR messages for these three airports.
2.42-tmsimulator: ERROR: (airport invalid icao='N14' tsc='/Users/username/Library/Application Support/Aerofly FS 4/scenery/airports/act_airports_all/N14/N14.tsc')
2.42-tmsimulator: ERROR: (airport invalid icao='S40' tsc='/Users/username/Library/Application Support/Aerofly FS 4/scenery/airports/act_airports_all/S40/S40.tsc')
2.42-tmsimulator: ERROR: (airport invalid icao='U70' tsc='/Users/username/Library/Application Support/Aerofly FS 4/scenery/airports/act_airports_all/U70/U70.tsc')
FS4 also has a bug with an airfield:
2.80-tmsimulator: ERROR: (airport invalid icao='L05' tsc='scenery/airports/custom/us/l05/l05.tsc')
My question now is what can be automated in the tool to prevent errors from occurring, and what needs to be included in the instructions to avoid errors on the user side?
--------------------
(2) SKIPPING airports
I found the SKIPPING notice at three airfields:
2.72-tmsimulator: skipping duplicate place 'scenery/airports/be/ebbl/ebbl.tsc'. icao='EBBL' using '/Users/username/Library/Application Support/Aerofly FS 4/scenery/airports/act_airports_all/EBBL/EBBL.tsc'
2.72-tmsimulator: skipping duplicate place 'scenery/airports/be/ebkt/ebkt.tsc'. icao='EBKT' using '/Users/username/Library/Application Support/Aerofly FS 4/scenery/airports/act_airports_all/EBKT/EBKT.tsc'
2.72-tmsimulator: skipping duplicate place 'scenery/airports/be/ebos/ebos.tsc'. icao='EBOS' using '/Users/username/Library/Application Support/Aerofly FS 4/scenery/airports/act_airports_all/EBOS/EBOS.tsc'
My question is whether FS4 automatically prefers user airports to FS4 airports, so that one does not have to delete existing airports in FS4 if one wants to create them oneself?