Tracking Residual

I need to track the residual in my simulation in order to represent how closely the governing equations are being represented. I know comsol keeps track of residual since ive had several errors referring to it. Post processing doesnt have residual as a specific plotting value as far as i know.

Do i need to use a specific solver which uses residual? Does any one know how to access its value? I can use matlab live link if necessary.