前面net from http://www.stata-press.com/data/mais
net install mais
spinst_mais
都没有问题，之后运行
ssc install metan
就出现问题了
ssc install metan
checking metan consistency and verifying not already installed...
the following files already exist and are different:
c:\ado\plus\m\metan.ado
c:\ado\plus\m\metan.hlp
c:\ado\plus\l\labbe.hlp
no files installed or copied
(no action taken)
求解，详细一点，求解怎么能安装好meta模块。