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


From   "Dr. Stephen Rothenberg" <srothenberg@mda.cinvestav.mx>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Re: RE: Problem with xtmixed after gam (was:xtmixed broken in Stata 9.1?)
Date   Wed, 21 Sep 2005 16:20:41 -0500

That did the trick, Nick, though I'm not sure why. But it works well enough to satisfy me.

Many thanks,
Steve

----- Original Message ----- From: "Nick Cox" <n.j.cox@durham.ac.uk>
To: <statalist@hsphsun2.harvard.edu>
Sent: Wednesday, September 21, 2005 4:05 PM
Subject: st: RE: Problem with xtmixed after gam (was:xtmixed broken in Stata 9.1?)



Patrick Royston has not been a member of Statalist
for some years. I doubt that your guess is precisely
in the right territory, particularly in terms of
what a Fortran program might do here.

Perhaps you could try other solutions such as

. estimates clear

before firing up

. xtmixed

again.

Nick
n.j.cox@durham.ac.uk

Dr. Stephen Rothenberg

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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>
>


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