[R] Warning message

[F Monadjemi]

Dear reader,

I am trying to simulate 1000 data from nonlinear model in order to be able to
do
mixed effect analysis. If the program works but give you following warning
message, what should I do? Can I still accept the result, which is about the
precision of model parameter estimation? 


FALSE CONVERGENCE. in: ms( ~  - logLik(nlmeSt, nlmePars), start = list(nlmePars
=
	c(coef(nlmeSt))), control =  ....
SINGULAR CONVERGENCE. in: ms( ~  - logLik(nlmeSt, nlmePars), start =
list(nlmePars =
	c(coef(nlmeSt))), control =  ....


Thanks

Farinaz