Abhijeet Chilwirwar

Thanks for the reply john. The optimization itself is not getting initiated. After hitting "Solve" for topology optimization, it throws these errors. Coming on the first part, Can you tell me how can I remove the sources of non-linearities? I have a frictional contact between the curved plate and femoral head. So how can get rid of it. I also want to know what does non-linearity have to do with topology optimization?