Dear All,

I need help with the eventdd command. When I type

Code:
xtset artist_name2 bdate2
ssc instal eventdd, replace
gen timeToTreat = year-deathday
eventdd y_nexhibitions female solo museum i.year, timevar(timeToTreat) ci(rcap)  accum  leads(10) lags(10)
stata returns:

command matsort is unrecognized
r(199);

Any ideas why?
thanks!