是程序没有更新完毕 已解决

尽量不要联网更新，采用本地更新。

The Stata package has two components: the executable and the ado-files. One of the components is out of sync with the other because of an incomplete update. The error can be resolved by completing an update. The update commands will restart Stata, so make sure that any important information is saved before you proceed. If you have a direct Internet connection, type

     . update executable, force
     . update swap   
It is not necessary to type update swap on a Windows machine, because update executable, force does this automatically.

After the update swap is complete, type

     . update ado, force
After the update is successfully completed, your estimation command should work properly

这是软件更新强制版 解决了我的stata问题 真心辛苦自学 昨晚一直学到今早5点 刚刚才弄巧成功了 笨人没办法 只有吃苦 慢慢摸索吧