[R] no results

[Alaa Sindi]

Hi All,

I am not getting any summary results and I do not have any error. what would be the problem? 



sem=mlogit.optim ( LL  , Start, method = 'nr', iterlim = 2000, tol = 1E-05, ftol = 1e-08, steptol = 1e-10, print.level = 0)
summary(sem)

thanks