I'm on about my 6th SW animation and still struggling with the random events that unexpectedly occur. I'm on 2009 and 2010 with the latest service packs with a SW certified graphics card, ample ram.

The main issue I am struggling with currently is that I have a part defined by two coincident mates and a limit distance mate that I want to animate linear motion between the limits. I have successfully animated the same part in the past in the same assembly with the same mates. When I set the second keypoint and drag the object into position it puts the green line in between the points and shows the object in the correct location. When the motion study is calculated the object doesn't move and the second keypoint turns red. When I hover over the second keypoint the object jumps to its correct position.

Has anyone encountered this (surely) and is there an easy fix? I normally end up redoing my whole animation as a workaround.

Thanks.