初学stata，利用自带的数据，做histogram，返回如下，请问问题出在哪里呢？谢谢

. sysuse nlsw88.dta,clear
(NLSW, 1988 extract)

. histogram wage
(bin=33, start=1.0049518, width=1.2042921)
axis.new: class member function not found
(error occurred while loading twowaygraph_g.class)
twowaygraph_g.new (histogram wage [], barwidth(-99) plotregion(margin(b=0)) density start(1.00495183467865) bin(33)) if
    __000000, ytitle(`"Density"') xtitle(`"hourly wage"') legend(cols(1)) legend(nodraw): class member function not found

twoway is not a valid graph subcommand
r(198);