I am attempting to complete a fully coupled thermal-stress analysis in ABAQUS on a truss structure. I see in ABAQUS documentation that the thermally coupled truss can support surface flux and surface radiation, yet when I apply the loading/interaction, the program states this type of load is not allowed for the selected element (T2D2T). I have applied concentrated fluxes and radiations on the end nodes, yet the resulting nodal temperatures are very high and I am assuming are incorrect. Thank you in advance for your responses.