Error lclogitml2-initial values not feasible

[Guan HUANG]

Hello, I'm recently using lclogit2 to work out a discrete choice model of 2 alternatives with 120k observations. When I use the "lclogitml2" after "lclogitml", I meet an "initial values not feasible" problem.

lclogit2 choice, rand(fare time) group(id) id(id) nclasses(4) membership(match_rate demand miles speed #here are another 20 variables#) seed(0)
#successfully get the output of lclogit2
matrix start = e(b)
lclogitml2 choice, rand(fare time) group(id) id(id) nclasses(4) membership(match_rate demand miles speed #here are another 20 variables#) seed(0) from(start)
initial values not feasible
r(1400);

I've tried several methods including:
1) run the example code in lclogit2. Example works, which proves the completeness of the function;
2) remove most of the membership variables for a simpler model, won't work;
3) downsample most of the observations, won't work;

Since these methods won't work, I had a view of the source code of lclogitml2.ado and suspect the error may happen here:

ml model gf0 lclogitml2_gf0() `Class' `Share' `Fix' if `touse', ///
                                   missing maximize nopreserve init(`from') search(`search') `constr' ///
                                   `options' wald(0)

Can you give me some suggestions on where the error might exist? Thank you.

[Hong Il Yoo]

Guan HUANG: You may get the error message for several different reasons. So that we can narrow down the list of suspects, could you provide an example data file and code which can be used to replicate the problem that you're experiencing?