ansys优化设计出现错误问题。？ 20

在用ansys进行优化设计时，在优化循环阶段弹出以下内容的窗口：An error has occurred in ANSYS during this optimization loop.  The design variable settings have produced a design that cannot be solved  by ANSYS.  Optimization will continue after setting the response variables (SVs and OBJ) to large numbers.  这是怎么回事，该怎么解决？急需。。。