It’s not listed in the ‘BezierCurve’ API.
What king of parameters does it expect ?
Does it actually exist, or never got implemented in Natron ?
Because script console says ‘BezierCurve’ object has no attribute ‘slavePointToTrack’.
For me, it doesn’t make sense to attack a Bezier control point to a track. Better compute a transform from the tracks, and apply it to the Bezier. If you have an example project that you can share, we can put it in the tutorial