I am modelling a complex contact problem where I need to use both *FRIC subroutine and *FRIC_COEFF subroutine, since the coefficient of friction is dependent by temperature and slip rate, and the friction law change also respect these parameter. I have each single working on its own but they must work togheter. If I used the keyword *FRICTION, I can specify the type of friction subroutine by adding the command "USER = ", if is left as it is by default it will search for FRIC subroutine, if I put "USER=COEFFICIENT" it will look for FRIC_COEFF subroutine. The issue is that I am not able to use both at the same time, or at least I dont know the command to call both togheter. Do you have any suggestion? Thank you all in advance