I have created an update for the first airport I've done. It's on my website and it's submitted to MSFS Marketplace. However I had 2 people complain now about it causing immediate CTDs either when starting a flight (default location), or even just zooming up in the map before starting the flight - where the parking spaces would be selectable, they get instant CTD every time. I updated and compiled using the latest beta SU12, and at least one user also uses the latest beta.
Nothing I can do should ever cause CTD. It's a very small airport without a tower. I have initially started from the default airport, and many starts are not connected to any taxiways (as I think the default was), but that's the only thing I can think of that's different from my other airports.
Previous old version of this airport works fine, but new one causes instant CTDs at least for some people. It compiles without errors.
Please advise about how should I proceed and troubleshoot it. I'm not sure how to upload the package here as it's too large for the form (but not so large overall, under 200Mb).