Need Help with AI Crashing FS on 2nd run

I have created my first AFCAD airport and AI flight (using TTools).
The plane will take off when expected and land when expected. But on the second takeoff, when the plane reaches the hold node, the program crashes to desktop. I've tried different flightplans with different planes and it always crashes on the second trip to the hold short node.
Is this a FSCAD error or flightplan error??
TIA
Ron Ezra
The plane will take off when expected and land when expected. But on the second takeoff, when the plane reaches the hold node, the program crashes to desktop. I've tried different flightplans with different planes and it always crashes on the second trip to the hold short node.
Is this a FSCAD error or flightplan error??
TIA
Ron Ezra