我的模型建立完毕，导入数据运行后，Note for Model中却显示如下：

Computation of degrees of freedom

    Number of distinct sample moments  =  153

    Number of distinct parameters to be estimated  =  37

    Degrees of freedom  =  153 - 37  =  116

The model is probably unidentified. In order to achieve

identifiability, it will probably be necessary to impose 2

additional constraints.

The (probably) unidentified parameters are marked.

这是怎么回事？该怎么

修改模型啊，

请那位高手指点一二，否则我的

下面工作无法进行了，多谢了！