我按着汉密尔顿的书上的do文件制图,总是提示parentheses do not balance, 我仔细核对了我的输入和<<应用STATA做统计分析>>书上的写法, 找不到问题所在.我是做书上图3.48,do文件如下.请高手指点

PS:除了文件路径不一样，其余的好像都是一样的

#delimit ;
use D:\study\stata\sws10\gulf.dta, clear ;
graph twoway connected maxarea winter, yaxis(3)
   yscale(range(-300,220) axis(3)) ylabel(50(50)200, nogrid axis(3))
   ytitle(" Ice area, 1000 km^2", axis(3) placement(nw))
   clpattern(dash)
   || line cil winter,yaxis(2) yscale(range(-4,3) axis(2))
   ylabel(,nogrid axis(2))
   ytitle("CIL temperature, degrees C", axis(2) clpattern(solid)
   || connected cod winter, yaxis(1) yscale(range(0,200) axis(1))
   ylabel(, nogrid axis(1))
   ytitle("Cod catch, 1000 tons", axis(1) placement(sw))
   || if winter>1959,
   legend(ring(0) position(7) label(1 "Max ice area")
      label(2 "Min CIL temp") label(3 "Cod catch") rows(3))
   xtitle("") xlabel(1960(5)2000, grid)
   saving(D:\study\stata\sws10\fig03_48, replace) ;
graph export D:\study\stata\sws10\fig03_48.eps, replace ;
#delimit cr