st: Error message when trying to regression model with eststo prefix.

[Amal Khanolkar <Amal.Khanolkar@ki.se>]

Hi all,

I'm trying to run the regression model below. I get an error message that says 'factor variables' not allowed.

This is quite strange, given that I ran the exact same regression model last week and had no problems! Can anyone tell me what's going wrong?

. eststo: xi: logistic verypreterm i.ethnicity2 sex byear ib3.magecat i.parity if education!=. & famsit_new2!=. & smoke1!=. & multibirth==1, vce (robust)
i.ethnicity2      _Iethnicity_1-22    (naturally coded; _Iethnicity_1 omitted)
i.parity          _Iparity_1-3        (naturally coded; _Iparity_1 omitted)
factor variables not allowed
r(101);
end of do-file

Regards,
Amal Khanolkar
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