求助，用MIDAS做连续梁的施工阶段
如题，遇到了很多错误，应该怎么改啊？附上模型，大家帮我看看WARNING : NODE NO. 2 DY DOF HAS A SINGULAR DIAGONAL = 0.000 WARNING : EQUATION NO. 8WARNING : NODE NO. 2 RX DOF HAS A SINGULAR DIAGONAL = 0.000 WARNING : EQUATION NO. 10WARNING : NODE NO. 2 RZ DOF HAS A SINGULAR DIAGONAL = 0.000 WARNING : EQUATION NO. 12WARNING : NODE NO. 2 RX DOF MAY BE SINGULAR.WARNING : EQUATION NO. 10WARNING : NODE NO. 2 RZ DOF MAY BE SINGULAR. MULTI-FRONTAL SOLUTION HAS BEEN PERFORMED 70 % .WARNI