st: Problem with xtmixed after gam (was:xtmixed broken in Stata 9.1?)

["Dr. Stephen Rothenberg" <srothenberg@mda.cinvestav.mx>]

The problem was solved by exiting Stata, shutting down the machine, booting 
up cold and re-running the commands.

Previous to the xtmixed problems I had been running a set of -gam- models on 
another data set.

After successfully running -xtmixed- on a clean machine and unused Stata 
session, I then tried a -gam- analysis and went back to -xtmixed-.  The 
problem re-appeared.

Apparently -gam- now does something bad to Stata 9.1, leaving it in a state 
from which it cannot use what -xtmixed requires.  Perhaps its call to a 
FORTRAN program is what screws up the subsequent -xtmixed-.  The problem 
doesn't occur after -gam- when I run the "pig" data set with regress nor 
when I try -xtreg, mle-, but I don't have time to exhaustively test all 
the -xt- commands

Does anyone know if Patrick Royston or Gareth Ambler, the authors of -gam-, 
are still members of statalist?

Thanks for clueing me that it was something I had done, Nick, and not 
general to Stata 9.1.

Best,
Steve

----- Original Message ----- 
From: "Nick Cox" <n.j.cox@durham.ac.uk>
To: <statalist@hsphsun2.harvard.edu>
Sent: Wednesday, September 21, 2005 3:08 PM
Subject: st: RE: Re: RE: xtmixed broken in Stata 9.1?



> That clearly looks OK. The explanation
> must therefore lie elsewhere, but I've
> run out of ideas.
>
> Nick
> n.j.cox@durham.ac.uk
>
> Dr. Stephen Rothenberg
>
> > Here is my update status:
> >
> > --------------------------------------------------------------
> > -------------------
> > update query
> > --------------------------------------------------------------
> > -------------------
> > (contacting http://www.stata.com)
> >
> > Stata executable
> >     folder:               C:\Program Files\Stata9\
> >     name of file:         wsestata.exe
> >     currently installed:  15 Sep 2005
> >     latest available:     15 Sep 2005
> >
> > Ado-file updates
> >     folder:               C:\Program Files\Stata9\ado\updates\
> >     names of files:       (various)
> >     currently installed:  19 Sep 2005
> >     latest available:     19 Sep 2005
> >
> > Recommendation
> >     Do nothing; all files up to date.
> >
> > Click to edit automatic update checking preferences
> > --------------------------------------------------------------
> Nick Cox
>
> > > This works for me.
> > >
> > > Perhaps you updated your executable, but not
> > > the other files.
> Dr. Stephen Rothenberg
>
> > >> I'm trying to run -xtmixed- in Stata 9.1 SE, Windows XP,
> > >> after successfully using it in Stata 9.0.
> > >>
> > >> I keep getting the same error message no matter what my model
> > >> specs are (see
> > >> below).  Finally I tried copying Example 1 from the -xtmixed-
> > >> section of the
> > >> panel data manual.
> > >>
> > >> I downloaded the "pig" data set used in the example and tried
> > >> the code
> > >> listed there:
> > >>
> > >>     . use http://www.stata-press.com/data/r9/pig
> > >>     (Longitudinal analysis of pig weights)
> > >>
> > >>     . xtmixed weight week || id:
> > >>     last estimates not found
> > >>     r(301);
> > >>
> > >> The "not found" error message is the same problem when I use
> > >> my own data
> > >> set.
> > >>
> > >> Am I doing something dumb or is -xtmixed- broked in Stata 9.1?
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