Error when running MLwiN MCMC Manual examples

[FloHarrison]

Hi,

I'm trying to work out how to run multiple membership models through runmlwin, so am working through the examples in chapter 16 of the MLwiN MCMC Manual. Whenever I try and run something with the MCMC option on I get this error:

invalid expression
r(3000);

so

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runmlwin logearn cons age_40 numjobs, level2(company:) level1(id: cons) nopause

runs fine, but:

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runmlwin logearn cons age_40 numjobs, level2(company:) level1(id: cons) mcmc(on) initsprevious nopause

then generates the error.

Does anyone know why I'm getting this error, and what I can do about it? I'm using MLwiN2.26 and Stata/IC 11.0 for windows

Flo

[ChrisCharlton]

Could you please firstly check that your version of runmlwin is up to date? If it is then could you type the following Stata command before running the model:

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set trace on

and then us know what the output is prior to the error message?

[ChrisCharlton]

I've just remembered that I have come across this error before. Currently in runmlwin we have some version checking code which isn't correctly matched up (in one place it checks for 11.0 and another 11.1). You should be able to work around this by either updating your version of Stata to at least 11.1 (which you can do with the Help->Check for updates menu in Stata), or by editing the following lines in runmlwin.ado:

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if _caller() >= 11 {

to:

if _caller() >= 11.1 {

in the program define runmlwin_savechains section of runmlwin.ado.

This will be fixed in the next release of runmlwin.

[FloHarrison]

Hi Chris,

Thanks for your help - I went with the second option and it's all running fine now.

Flo