Did you have a target WP?
It uses the closest (usualy the first) target WP to calculate the ToT for the missile. It also assumes you are flying at the mach speed entered into to Wp before the target WP, and at a altitude of 600m.
The target waypoint acts as a planned release point, and CK37 will calculate ToF from that point through all the Bx waypoints all the way to Bx8. I've had success releasing them when passing over the Mx waypoint, it was a few seconds late, but still within the error of the ToT calculations.
Not sure if the ANF described function in the image below is implemented, will have to try it out again.
A little bonus, some translating from swedish. :smilewink: