Help problem with changing distance constraints parameters through script

[josemendez]

hey , thanks man. it works   
do you think there is a way to freeze the rope's position on one of the axis ?something like rigidbody constraints, i just need the rope not to swing on X axis

Nope, there's no way to do that. You can use 2D mode (which restricts particle movement to the XY plane), but other than that there is no way to constraint rope movement to an arbitrary plane.

You could try sandwiching it between two invisible colliders, I think it's the easiest approach (even if slightly hackish).