安装sg162.pkg的时候始终安装不了，出现这种问题会是什么原因啊？急，望高手能帮助！


package name:  sg162.pkg
        from:  http://www.stata.com/stb/stb60/

checking sg162 consistency and verifying not already installed...
I/O error
could not copy http://www.stata.com/stb/stb60/sg162/spatgsa.hlp
(no action taken)