Hello
I am using Stata 12 and trying to explore -birprobit- command. I am able to run the -biprobit- command but -margins- after it gives an error.

Code:
clear 

webuse school
biprobit (private =vote) (vote=loginc logptax)

margins, dydx(vote)

default prediction is a function of possibly stochastic quantities other than e(b)
r(498)
Please suggest a fix, if available.