st: need help with xtgee

["Paola Zaninotto" <p.zaninotto@ucl.ac.uk>]

I am running the following command:

xi:xtgee depvar gender i.educ age, i(gp) family(binomial) eform robust

and I get this error:

matsize too small -- must be able to set matsize to at least 1323

I have Intercooled Stata version 9, so the maximum matsize is 800. Is it really a problem of matsize or a matrix problem?

Does anyone know how can I sort it out?

Thank you

Paola