st: Bug with destring or operator error?

["Ben Hoen" <bhoen@lbl.gov>]

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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