求大神解答，仿真出现这种错误是什么意思

lqbyhyy

Singularity has been detected within  SUBROUTINE REDUCT,  which does Gaussian elimination.   The diagonal element for row  4   is equal to  0.00000000E+00,   which is less than the tolerance  EPSILN  of the floating-point miscellaneous data card.Other local variables that might be valuable to Program Maintenance in interpreting the trouble are as follows :   N = 6     M = 0
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wangdc

计算没有收敛，肯定是参数设置有问题。