Hi Erik and Peter,nThanks for the replies. Peter - to your questions: the x,y,z data does represent displacement data of reference points on the surface. And yes, the load is a distributed load, but it's just on one surface of the body. Body material is isotropic.nThanks for clarifying that there is still a need to invert the stiffness matrix - that makes sense for the nodes inside the body.nDo either of you know of any tutorials that deal with enforced displacements to a body surface?nThanks.nn