Midas斜拉桥模型运行错误，新人求助啊！~~

错误代码：WARNING : NODE NO. 772 RX DOF MAY BE SINGULAR.WARNING : EQUATION NO. 2347
WARNING : NODE NO. 772 RY DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2348
WARNING : NODE NO. 772 RZ DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2349
WARNING : NODE NO. 770 RZ DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2337
WARNING : NODE NO. 770 RY DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2336
WARNING : NODE NO. 770 RX DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2335
WARNING : NODE NO. 770 DY DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2333
WARNING : NODE NO. 770 DX DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2332
WARNING : NODE NO. 937 RY DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3299
WARNING : NODE NO. 937 RX DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3298
WARNING : NODE NO. 937 DZ DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3297
WARNING : NODE NO. 937 DY DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3296
WARNING : NODE NO. 937 DX DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3295
WARNING : NODE NO. 899 DX DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3067
WARNING : NODE NO. 899 RZ DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3072
WARNING : NODE NO. 899 RY DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3071
WARNING : NODE NO. 899 RX DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3070
WARNING : NODE NO. 899 DZ DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3069
WARNING : NODE NO. 899 DY DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3068
WARNING : NODE NO. 182 RY DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 185
WARNING : NODE NO. 724 RY DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2060
ELEM. : 525 OF 525
WARNING : NODE NO. 772 DZ DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2346
WARNING : NODE NO. 772 RX DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2347
WARNING : NODE NO. 772 RY DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2348
WARNING : NODE NO. 772 RZ DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2349
WARNING : NODE NO. 770 RZ DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2337
WARNING : NODE NO. 770 RY DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2336
WARNING : NODE NO. 770 RX DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2335
WARNING : NODE NO. 770 DY DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2333
WARNING : NODE NO. 770 DX DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2332
WARNING : NODE NO. 182 RY DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 185
WARNING : NODE NO. 724 RY DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2060
WARNING : NODE NO. 462 DX DOF MAY BE SINGULAR.
WARNING : EQUATION NO. 1468
ERROR NORM IS NaN or INFINITE
THE PROGRAM IS ABORTED
只添加了自重和单元集中荷载，没有施工阶段，只想看下反力和挠度，但是分析不了，已经尝试了很多改变了还是不行，求助各位大神啦，跪谢！下面附上模型，求各位大神看看指导下！