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Re: st: CMP Error Message


From   William Buchanan <william@williambuchanan.net>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: CMP Error Message
Date   Sat, 23 Mar 2013 13:24:46 -0700

Which version of -cmp- are you using? David Roodman released an update to the program only a few days ago and maybe something is different.

Sent from my iPhone

On Mar 23, 2013, at 12:34, John Luke Gallup <jlgallup@pdx.edu> wrote:

> Jeffrey,
> 
> This is pretty clearly a bug in -cmp-, where the Mata function cmp_lnL() is probably calling the function l(), which cannot handle the value of its argument.  This is not likely to be a problem you can fix, unless you are not using -cmp- correctly.  In any case, a program like -cmp- should ideally trap user errors rather than crashing.
> 
> It is a little mysterious why -cmp- produced this error message when it apparently didn't during an identical previous run, but almost certainly something changed from one run to the next.
> 
> I think your best bet is to contact the author of -cmp-, David Roodman (see the end of the -cmp- help file for his email address), and politely ask for help.
> 
> John
> 
> On Mar 23, 2013, at 8:32 AM, Jeffrey Ferris <ferrij492@gmail.com> wrote:
> 
>> Hello,
>> 
>> I am working with the user generated command CMP and I am having a
>> strange problem that I am unable to diagnose. I am trying to estimate
>> a system of equations with one probit equation and two mprobit
>> equations (with no overlap between the multinomial models). Every time
>> I try to run the model it proceeds normally until it tries to collect
>> Halton draws and gives me the following error message:
>> 
>> "I():  3300  argument out of range
>>              cmp_lnL():     -  function returned error
>>                <istmt>:     -  function returned error
>> Mata run-time error"
>> 
>> The strange thing is that I ran the exact same code Thursday night and
>> it worked without problem. I have gone through every line of my code
>> and cannot see what could be causing this failure. I also double
>> checked that cmp is working correctly by running it with some older
>> models without failure. Does anybody have any idea what could be going
>> on or, more importantly, how I can rectify this problem? For those
>> interested, here are the commands I used to generate this output:
>> 
>> gen ind1=cond(treat_t==0,$cmp_mprobit,$cmp_out)
>> gen ind2=cond(treat_t==1,$cmp_mprobit,$cmp_out)
>> local 2step_m DstCityBdr_avg DistRds_avg DistIntHwy lntotstream_dens ///
>> lnsubdivarea existhouse MeanElev_avg MeanSlope_avg ///
>> Area100yr_dens depwat_avg hydgrp_C hydgrp_D
>> foreach class in RC4 RC2 {
>> local zone_int_rc `zone_int_rc' zone_`class' c.treat_t#c.zone_`class'
>> }
>> cmp (y= `zone_int_rc' minor_exempt_RC treat_t `2step_m' `years`i'') ///
>> (zone_class= `2step_m' DistRiver_avg DistPStrm_avg DistIStrm_avg
>> Watershed2-Watershed15, iia) ///
>> (zone_class= `2step_m' DistRiver_avg DistPStrm_avg DistIStrm_avg
>> Watershed2-Watershed15, iia) ///
>> if `timeline`i'' & RCsum>0.5, difficult indicators($cmp_probit ind1 ind2) ///
>> tech(dfp nr) cluster(ind) robust ghkdraws(10)
>> outreg2 using cmp_rc`i'.csv, replace dec(3)
>> 
>> Thank You,
>> 
>> Jeff Ferris
>> *
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