You have some other file in your sim that is conflicting.
Are you using MyTraffic? If so there are thousands of airport files that will conflict with any addon airports that you have and you need to remove or disable them.
Hello there.
No not using any traffic add ons.
I isolated the cause, I think?
Its the underlying Orbx scenery. When I lower the scenery slider "Scenery Complexity" in the Scenery Objects settings, the building disappears?
So its an Orbx building. I thought FSDT over wrote those, but this is P3dv4 and I am using Orbx Southern California add on scenery as well, so I guess things are complicated?
At the moment FSDT airports are superior to anything else I see. I would like to get more airports but wonder what other conflicts I will find?
Trial and error I suppose.
Regards
David