But === Calculate the field at the nodes corresponding to the degrees of freedom imposed by AFFE_CHAR_CINE. This node field calculated in this way should be used when solving the linear system with the operator RESOUDRE [:ref:`U4.51.02 `]. This operator is only useful for "step-by-step" calculations where linear systems are solved using the RESOUDRE command. Produces a data structure of type cham_no.