Hessian Matrix

[Carole Birrell <cbirrell@uow.edu.au>]

Dear SPLUS users,
I am using the SPlus version 7.0 Finmetrics and in particular the SsfFit 
function.  This function has obviously changed from version 6.2 , and 
now seems to check for a Hessian matrix which is not invertible.
I am simulating data from a multivariate basic structural model and then 
attempting to estimate the parameters for this model.
I am now getting warnings saying that  "Hessian failed to invert. in: 
SsfFit(all9, Augmentdata, "EstAugSV", trace = T)".
Do I need to alter the precision somewhere, if so how do I do that?
If not, do you have any advice as to what I should do?

regards,
Carole Birrell
University of Wollongong.