lclogit/lclogitml: change of reference latent class

Dear all,

I am using the lclogit/lclogitml command in Stata/SE 13.1 with 3 or more latent classes. I am especially interested in the t-statistics of the class membership model

- Is there a way to change the reference class for the class membership model in lclogit/lclogitml?
or
- If changing reference class is not possible, is there a way to calculate standard errors for a manuel change of the reference class. I cannot see that the variance/covariance matrix of the membership model is part of the lclogitml output.

Thank you very much
Gerald