求助！LISREL中Fitted Covariance Matrix无法迭代
请教各位大神：在用LISREL做SEM的模型识别和估计时，在Fitted Covariance Matrix之后出现Unable to start iterations because Fitted Covariance Matrix is not positive definite. 这种拟合协方差矩阵非正定的问题一般能够怎么解决呢？谢谢各位了！
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