1.为什么不查命令 ssc  帮助？

    Install a specified package from SSC
        ssc install pkgname [, all replace]

Options for use with ssc install

    all specifies that any ancillary files associated with the package be
        downloaded to your current directory, in addition to the program and
        help files being installed.  Ancillary files are files that do not end
        in .ado or .sthlp and typically contain datasets or examples of the use
        of the new command.

        You can find out which files are associated with the package by typing
        ssc describe pkgname before or after installing.  If you install without
        using the all option and then want the ancillary files, you can ssc
        install again.

    replace specifies that any files being downloaded that already exist on your
        computer be replaced by the downloaded files.  If replace is not
        specified and any files already exist, none of the files from the
        package is downloaded or installed.

        It is better not to specify the replace option and wait to see if there
        is a problem.  If there is a problem, it is usually better to uninstall
        the old package by using ssc uninstall or ado uninstall (which are, in
        fact, the same command).




2、出错的提示难道看不懂吗？   files already exist
你自己说遇到这种情况该怎么处理吧？

怎么处理，我也遇到这个问题了

有个经验共享，stata 14下载了metabias 9.2，但使用dlg文件操作时，无法驱动begg的graph，使用命令操作也无法驱动，显示命令的操作为:
metabias  logor selogor,graph(begg),如按帮助方法，采用metabias logor selogor,begg graph,也是不能驱动。但如下载metabias6,即版本为1.2.4时，是可以使用dlg文件操作的，显示命令的操作为metabias logor selogor,graph(begg)。