Can NURBS curve control knots snap to vertices?

I try to model a 3D surface by creating NURBS curves first. I would like to move the control knots to certain places on other geometry, like vertices. I tried to do this via snap, but the knots do not snap to vertices or anything else. Whats wrong?

Many thanks for your help.

I don’t think they will snap. You’ll can position the curser where you want the control point to be then snap the control point to the curser with the Shift+S snap options