st: RE: Bug with destring or operator error?

[Joe Canner <jcanner1@jhmi.edu>]

__00001 sounds like Stata's internal designation of a temporary variable.

-destring- is an .ado file, so you can -set trace on- before the -destring- and see exactly where the problem is.  Let us know what you find and maybe we can dig around in the -destring- code and see what is causing it.

Regards,
Joe Canner


-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Ben Hoen
Sent: Thursday, August 22, 2013 1:49 PM
To: statalist@hsphsun2.harvard.edu
Subject: st: Bug with destring or operator error?

Hi all,

I am having trouble with destring in an ado.  When I run the ado I get the following error:


. destring blkgrp, g(bgtemp) force
__000001 already defined
r(110);

end of do-file

r(110);

But after I get this error, if I just run the destring command again, it works fine:
. destring blkgrp, g(bgtemp) force
blkgrp contains nonnumeric characters; bgtemp generated as int
(44 missing values generated)


I have tried a number of different workarounds to keep the error from happening but to no avail.  Obvioulsy the point is to avoid manually coming and rerunning the second half of the ado.  Any ideas?  

Here is the full ado: 

*=============== START ==============
cd "B:\OtherDatabase\pv_prop_2\data\regest"
use bgreg.dta, clear //to call up the data g blkgrp=substr(parm,4,.) if substr(parm,1,3)=="pv_"  // the extract the number from the string destring blkgrp, replace force

/*
I also tried the following variations

With or without .replace blkgrp=trim(blkgrp) before destring

Instead use
destring blkgrp, g(bgtemp) force
drop blkgrp
rename bgtemp blkgrp
*/
*========== END ==============

Ben Hoen
Staff Research Associate
Lawrence Berkeley National Laboratory
Office: 845-758-1896
Cell: 718-812-7589
bhoen@lbl.gov
http://emp.lbl.gov/staff/ben-hoen

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