Greetings I am trying to model and simulate a slider-crank using NX however I am getting some problems. Would be grateful if someone could help me with the following issue. My slider crank consists of 3 links, one of them fixed, 2 revolute joints and 1 slider joint. Even though when I move the parts individually during assembly the following problem does not occur but during the solution links lose contact (LINK1 and LINK2) from the J002 that you can see in the attachments. Could anyone explain me what the problem could be. Please tell if you need some extra information. Thanks for reading.