Initially I was having Normal Stiffness to program controlled but I change it to factor because my billet was just passing through without any change in shape.I was also just using first load step only but I changed just to see whether it could have any effects on my billet.But all the settings you mentioned didn't solved my initial problem that was having the deformation when the billet passes through the roller.So initially also the solver was giving me solution and now also but if I remove the pin ball radius it is giving me errors. So my question is still the same that how to have deformation effect when my billet is passing through the roller