Benjamin,

Please provide an illustration of your dataset and post your syntax.

Ryan

On Wed, Jun 1, 2011 at 9:46 AM, Benjamin Spivak (Med) <benjamin.spivak@monash.edu> wrote: > Hi all, this is my first post. > > I am currently attempting to fit a two factor hierachical model with a > random subject effect (for nested design). However, when I run my model I > get the following message "The final hessian matrix is not positive definite > though all convergence criteria are satisfied". When I look at my estimates > of covariance parameters table, I find that my Intercept (subject) variance > is zero, with the message that my covariance parameter is redundant. If > anyone can explain what is occuring and give me some advice on how to fix > it, I would be very grateful. > > Thanks.

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