在做岩土工程实例详解（费康）中的悬挂防水墙防渗效果出现的问题

ELEMENT OUTPUT ON EXTERIOR ELEMENTS HAS BEEN SPECIFIED. HOWEVER, THERE ARE NO ELEMENTS IN THE MODEL FOR WHICH THIS TYPE OF OUTPUT IS SUPPORTED. ELEMENT OUTPUT ON EXTERIOR ELEMENTS IS SUPPORTED ONLY FOR 3-D CONTINUUM ELEMENTS AND SHELL AND MEMBRANE ELEMENTS, EXCEPT AXISYMMETRIC SHELLS AND MEMBRANES.