analisifem

good morning to all, trying to make the fem of a tree with quarry for tongue subject to to torque (with cat) once created the mpc and applied the forces returns me the following errorI tried several times to redefine the mpc but the error remains present. . . Do you know what it can be due to?

hello to all:) are new in this forum. I'm approaching the patran/nastran program because of the thesis in engineering. Since they are at the very first weapons, can someone kindly explain to me what is the conceptual setting that is at the base of these software? How should I proceed to realize...