I am trying to run a weakly-coupled solution (thermal and structural) with a custom MATUSR subroutine.
If I define the properties using MAT1 and MAT4, it works perfectly fine (see the attached model brick_coupled_builtin.fem).
If I define the properties using MATUSR and MAT4, I receive the following error:
*** ERROR # 70 *** Thermal loads exist, and all material thermal expansion coefficients are zero.
I did not see anywhere in the documentation whether MATUSR did or did not support extra material cards. Would you have any idea if that's possible?