我运行了一个gauss的程序，可是却出现了这些错误，望高人释疑。程序应该是没问题的呀，这些是什么问题呢？说变量未定义，可是好像都是程序现成的一些过程吧？是我程序有问题？我是Gauss9，还是缺少什么东西了？谢谢各位了！很急！

Undefined symbols:
    graphset                           E:\Economics's learning\gauss9\tar_rate.prg(295)
    pqgwin                             E:\Economics's learning\gauss9\tar_rate.prg(296)
    many                               E:\Economics's learning\gauss9\tar_rate.prg(296)
    fonts                              E:\Economics's learning\gauss9\tar_rate.prg(300)
    title                              E:\Economics's learning\gauss9\tar_rate.prg(303)
    xlabel                             E:\Economics's learning\gauss9\tar_rate.prg(305)
    xy                                 E:\Economics's learning\gauss9\tar_rate.prg(306)
    begwind                            E:\Economics's learning\gauss9\tar_rate.prg(334)
    window                             E:\Economics's learning\gauss9\tar_rate.prg(335)
    setwind                            E:\Economics's learning\gauss9\tar_rate.prg(336)
    ylabel                             E:\Economics's learning\gauss9\tar_rate.prg(338)
    nextwind                           E:\Economics's learning\gauss9\tar_rate.prg(340)
    endwind                            E:\Economics's learning\gauss9\tar_rate.prg(344)