Hi there, I got warning information when I start dynamic time response analysis. I ignored the warning and executed the analysis to see what happen. The stress at contact area looks too little to make sense. Does anyone know the detail fo the issue? How does Pro/Mechanica provide the contact data during dynamic time response? Thank you, Tyler This thread is inactive and closed by the PTC Community Management Team. If you would like to provide a reply and re-open this thread, please notify the moderator and reference the thread. You may also use "Start a topic" button to ask a new question. Please be sure to include what version of the PTC product you are using so another community member knowledgeable about your version may be able to assist.