Hi Tom, in between I had some tests with the ADE file.
I want to get the AI aircrafts to "drive throu" their parkings (I read Drive-Through Parking Tutorial from Don) and I have some succsess.
I will come back with changed layouts. Now there is no ATC stop any more. I have to get some okays from the ADE creator before showing the layout.
The problem was not at the "hold short range", but some hundred meters before.
Thanks for your help, I am sure I will need it soon again