DATA:
            FILE IS C:\Users\lwj19\Desktop\xueya.dat;
  VARIABLE:
            MISSING ARE ALL (-99);
            NAMES ARE IDind T2 xueya1989 weight1989 xuya1991 weight1991 xueya1993
            weight1993 xueya1997 weight1997 xueya2000 weight2000;
          USEVARIABLES=xueya1989 xuya1991 xueya1993
           xueya1997 xueya2000;
    Model:
              i s |xueya1989@1 xuya1991@2 xueya1993@3
               xueya1997@4 xueya2000@5;
     Output:tech1 stand;
            Plot:Type is Plot3;
            Series=xueya1989 xuya1991 xueya1993
             xueya1997 xueya2000（*）;

*** WARNING in VARIABLE command
  Note that only the first 8 characters of variable names are used in the output.
  Shorten variable names to avoid any confusion.
*** ERROR in PLOT command
  Missing x-values in the SERIES option for the process:
  xueya1989 xuya1991 xueya1993 xueya1997 xueya2000（*）