Collision detection and the ice gate

[omar]

I made a 20k x 30 k pix bitmap with the ice gate, for collision detection in leg 5.

download here (zipped)

[stufishing]

I have downloaded your bitmap and loaded it under routing config.
Ticking land collision detection to on breaks the routing and gives the below message
LGC distance = 2796.1NM
shortest = 0.0NM
longest =0.0NM
points =1
successful tracks =1
best time = 0d 00:00:00


Unticking land collision again gives me routes over land again.

Please can anyone give me any help on getting land collision to work properly?

Thank you.