I am attempting to run a motion analysis study on the braking system of a freight wagon. There are a number of linkages being driven by a pneumatic cylinder, before transmitting the force onto the wheel circumference via the brake blocks (4).

I keep getting this error message which refers to an integration error. One of the suggestions  to resolve the issue is reducing HMIN, among others, but can't see where this reference to HMIN can be changed. Any suggestions please? How do I solve this problem?