I apologise for troubling such a distinguished group, but I need your help.You probably better do it in Dev Mode. The method used for scenery polys is changed in recent updates and ADE is not yet modified for that
I have successfully created airfields in FSX with the FSX version of ADE, and when I switched to flying in MSFS2020, I was able to import projects from the old version into the new ADE for 2020, build them, create them in the community folder, and fly to them with no problem. That was several months ago, I think using up to hot fix 3.
I have now tried to create a simple airfield using the hot fix 5 - I used the installer for HF4 then added HF5 as described previously in this thread. The airfield - just a runway - builds ok, the CMD box reports no errors, and the folder appears within the community folder. However, when I try to start a flight at this airfield, I get an immediate CTD - "The instruction at [memory location] referenced memory at [memory location]. The memory could not be read.". I have tried flying to this field in a helicopter, all is well until I touch down, when I get a CTD.
If I examine the folder in the community file, I have layout and manifest .json files, and scenery folder containing a world folder containing a scenery folder containing the airport BGL.
Any ideas as to what I should check please?