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Re: st: punaf error, even with version control

From   Roger Newson <>
Subject   Re: st: punaf error, even with version control
Date   Mon, 03 Oct 2011 15:49:14 +0100

I have had a look at the inside of -punaf-, and have traced the problem. There seems to have been a change in -margins- parameter names during the update from Stata 11 to Stata 12.

Under Stata 11, if you typed

use, clear
logit low i.race i.smoke, or robust
margins, at((asobserved) _all) at(smoke==0) post
ereturn list
matr list e(b)

then you would find that the -margins- parameter names (belonging to scenario means) were -_cons- and Under Stata Version 12, the parameter names are and It was this change that has broken -punaf-, which assumes the old parameter names.

I will attempt to fix this feature by updating -punaf- to Stata Version 12. In the meantime, many thanks to Andrew again for alerting me to this problem.

Best wishes


Roger B Newson BSc MSc DPhil
Lecturer in Medical Statistics
Respiratory Epidemiology and Public Health Group
National Heart and Lung Institute
Imperial College London
Royal Brompton Campus
Room 33, Emmanuel Kaye Building
1B Manresa Road
London SW3 6LR
Tel: +44 (0)20 7352 8121 ext 3381
Fax: +44 (0)20 7351 8322
Web page:
Departmental Web page:

Opinions expressed are those of the author, not of the institution.

On 03/10/2011 13:07, wrote:
Hello everyone,

I am trying to use _punaf_ in Stata 12; it worked fine in v11, but
even the examples fail in v12, giving

[_cons] not found

I have tried version control without success- I suspect the logit
estimates are simply un-findable by _punaf_ ?
Any ideas would be greatly appreciated.

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