本人刚学习AMOS，毕业论文中用到，很多不懂，请问高手下面的错误提示是什么意思，怎么改，万分感谢
The specified model is probably unidentified

The following message indicates that a model appears to be unidentified.

The specified model is probably unidentified. In order to achieve identifiability, it will probably be necessary to impose xxxxx additional constraint(s).

The (probably) unidentified parameters are marked.

The method that Amos uses for determining that a model is unidentified, and for determining how many additional constraints are required to make the model identified, is fallible. However, it is usually right. See Appendix D.