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Re: st: Undocumented XTMIXED error


From   Nick Cox <njcoxstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Undocumented XTMIXED error
Date   Sat, 24 Sep 2011 18:29:02 +0100

All I can say is that it seems odd that the method fails like this. If
the data didn't suit the model it would seem more likely that fitting
would not converge or the fit would be pathological in some sense. I'd
send the data to Stata tech support unless a better suggestion
appears.

Nick

On Sat, Sep 24, 2011 at 5:16 PM, Stephen <ala.frosty@gmail.com> wrote:
> Thank you for the reply, Nick.
>
> I can run -xtmixed- with other variables in the dataset as well as on
> the pig data. I ran -update- and it indicated there was nothing to do.
> I ran update a few of days ago as well.
>
> I have two variables in the data that are supposed to be dependent
> (IR7 and IR8) but both give me this error. Do you have any other
> suggestions?
>
> Also, thank you for identifying the plural of "faux pas." I do
> appreciate your help with improving my French. :-) Without such
> annotations, I could not improve.
>
> Cheers,
>
> Stephen
>
>
>
>
> On Sat, Sep 24, 2011 at 5:14 AM, Nick Cox <njcoxstata@gmail.com> wrote:
>> The error message arises during calculation. -xtmixed- is not
>> reporting a problem with your syntax or data.
>>
>> Try the following
>>
>>  webuse pig, clear
>>  xtmixed weight week || id:, mle
>>
>> If it doesn't work, my wild guess is that your Stata has not been
>> -update-d properly, i.e. that your executable and other files are out
>> of sync. Check by
>>
>> . update query
>>
>> Nick
>>
>> FWIW, the plural of "faux pas" is also "faux pas".
>>
>>
>> On Sat, Sep 24, 2011 at 2:21 AM, Stephen <ala.frosty@gmail.com> wrote:
>>
>>> I'm new to this list so may I request that you please forgive any social
>>> faux pas' while I learn the norms.
>>>
>>> I am attempting to run xtmixed on Stata/IC 11.2 and receive an error:
>>>
>>> . xtmixed IR7 f3 || ID:, mle
>>>
>>> Performing EM optimization:
>>>
>>> Performing gradient-based optimization:
>>>
>>> missing parameter values not allowed
>>> __00000S not found
>>> r(111);
>>>
>>> end of do-file
>>>
>>> r(111);
>>>
>>> . list if IR7==. | f3 == . | ID==.
>>>
>>> .
>>>
>>> I cannot find any documentation on this error and do not know what it means.

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