Midas斜拉桥模型运行错误，新人求助啊！~~
错误代码：WARNING : NODE NO. 772RXDOF MAY BE SINGULAR.WARNING : EQUATION NO. 2347WARNING : NODE NO. 772RYDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2348
WARNING : NODE NO. 772RZDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2349
WARNING : NODE NO. 770RZDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2337
WARNING : NODE NO. 770RYDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2336
WARNING : NODE NO. 770RXDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2335
WARNING : NODE NO. 770DYDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2333
WARNING : NODE NO. 770DXDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2332
WARNING : NODE NO. 937RYDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3299
WARNING : NODE NO. 937RXDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3298
WARNING : NODE NO. 937DZDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3297
WARNING : NODE NO. 937DYDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3296
WARNING : NODE NO. 937DXDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3295
WARNING : NODE NO. 899DXDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3067
WARNING : NODE NO. 899RZDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3072
WARNING : NODE NO. 899RYDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3071
WARNING : NODE NO. 899RXDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3070
WARNING : NODE NO. 899DZDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3069
WARNING : NODE NO. 899DYDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 3068
WARNING : NODE NO. 182RYDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 185
WARNING : NODE NO. 724RYDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2060
ELEM. : 525 OF 525
WARNING : NODE NO. 772DZDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2346
WARNING : NODE NO. 772RXDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2347
WARNING : NODE NO. 772RYDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2348
WARNING : NODE NO. 772RZDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2349
WARNING : NODE NO. 770RZDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2337
WARNING : NODE NO. 770RYDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2336
WARNING : NODE NO. 770RXDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2335
WARNING : NODE NO. 770DYDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2333
WARNING : NODE NO. 770DXDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2332
WARNING : NODE NO. 182RYDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 185
WARNING : NODE NO. 724RYDOF MAY BE SINGULAR.
WARNING : EQUATION NO. 2060
WARNING : NODE NO. 462DXDOF 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！
节点自由度约束！
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