Jeff - I encountered this when I referred to the iteration counter $ML_ic in
my .ado program. Apparently this global doesn't exist at -ml check- time.
However when I run the program without the -ml check- command it worked. I
don't know if this is the sort of thing that Alita had in her program.
Al Feiveson
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of
[email protected]
Sent: Thursday, May 26, 2005 10:20 AM
To: [email protected]; Alita Nandi
Subject: Re: st: ml check shows errors but ml maximize works
Alita Nandi <[email protected]> is getting an error message
from -ml check- when -ml max- would otherwise produce estimation results:
> --ml check-- gives the error message "cannot find feasible values"
> when it is testing to see whether the likelihood evaluator (the
> program that I have written to calculate the log-likelihood) works or
> not. But when I run --ml
> maximize-- without running --ml check-- before it, the maximization
> works and I get the estimates. By using --ml search-- before --ml
> maximize-- I get the same estimates. What I want to know is whether it
> is possible for --ml check-- to show that there are problems with my
> likelihood evaluator even if there is none. If not, what kind of
> errors in my programming (or perhaps the data set) may cause this
> discrepancy? I have not written the program code in this email so as
> not to clutter it. But please let me know if it is necessary to see
> the program code in order to be able to provide answers to my questions
and I will do so.
>
> I am running Intercooled STATA Version 8 on Windows.
We are confident that the results from -ml max- are reasonable; however, we
are unable to reproduce the problem with -ml check- that Alita mentions.
If Alita will send me the likelihood evaluator and a dataset with a log that
show the steps that result in the error message, we will look into this and
report on what we find.
--Jeff
[email protected]
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