Hello, I am trying to model a system that consisting of mass(which is in motion in x direction)- (spring &damper in x direction) - mass - (spring and damper in z direction) using simmechanics. While putting a joint spring and damper on a prismatic, it disconnects and the masses moves at separate velocity. Is this a normal situation ? I have been trying to fix things a lot. Now, suppose I use a revolute joint the masses stay connected, but not with the prismatic joint.