At 05:56 PM 7/20/2007, Jean Marie Linhart, StataCorp. wrote:
>Mirko <mirko.moro at gmail dot com> and others have reported a mysterious
>warning message with -mfx2- after -regoprob-, identifying that it is
>generated by -mfx- when the variable list in the original estimation and
>-at()- specification are long. We have been able to reproduce this
>problem.
>
>We believe the results from -mfx- are correct; the warning message is not
>correct and can be ignored. We want to do a little more exploring,
>and we will
>report back to the list with a definitive answer.
Thanks Jean. -mfx- subprograms -at- and -Parseatlist- include a lot
of equals signs when working with strings, and also use the string
functions -trim- and -index-. I think some or all of these can have
problems once strings get to be more than 244 characters. In
particular, mfx subprogram Parseatlist includes the lines
if index("`vars'","`thing1'")==0 {
local unfnd ="`unfnd'"+ " `thing1'"
}
That eventually leads to a false warning message if thing1 does not
occur within the first 244 characters of vars. I changed those lines to
local unfnd: list thing1 - vars
and the error went away. Anyway, I think that is among the changes
that could/should be made in mfx.
As far as I can tell though, you are correct in saying that, despite
the incorrect warning, mfx does produce the correct results.
-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
HOME: (574)289-5227
EMAIL: [email protected]
WWW: http://www.nd.edu/~rwilliam
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