. Bootstrap  r(ind_eff)  r(dir_eff), reps(100): sgmediation y1,iv(x) mv(a) cv(gender age huji party hunyin hea eduy f
> amilysize o y fincome1 GDP i.year i.pro1)  estat bootstrap,percentile bc
以下报错：
program bootstrap already defined
(error occurred while loading Bootstrap.ado)
这个怎么解决啊？