https://forums.autodesk.com/t5/inventor-forum/dynamic-simulation-over-constrained/m-p/5874331#M356101 <P>Have you saved all of your parts since the Updates?</P> <P>Some of your iProperties would seem to indicate - no.</P> Thu, 22 Oct 2015 21:47:24 GMT JDMather 2015-10-22T21:47:24Z