用AMOS把图形路径都画出来了，数据库也选好填进去了，前面的步骤都没有问题，但是在运行的时候连续弹出以下对话框：
An error occurred while attempting to fit the  model
in order to analyse data with missing observations,youmust explicitly estimate means and intercepts.
in amos graphics ,place a check mark next to "estimate means and intercepts"in the "analyses properties”window.
in programming the amos engines ,use the model meansand intercepts method.
麻烦哪位大侠帮忙看看，不胜感激！～
不知道什么意思？