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st: -save- sometimes drops variables ???

From   "Feiveson, Alan H. (JSC-SK311)" <>
To   <>
Subject   st: -save- sometimes drops variables ???
Date   Mon, 24 Mar 2008 14:16:21 -0500

Hi - A colleague of mine recently installed Stata 10 for WIndows on his
PC. He wanted to run this  do-file that I had written. But seemly at
random, when -save, replace- commands were executed, sometimes a
variable in the data file (not always the same one) was mysteriously
dropped. The same do-file works perfectly well on my machine (both are
PC's running Windows XP). I cannot get this error to happen on mine. As
an example, a section of the code contains something like

use mdata
(has 10 variables, including blah)
replace blah = xxx
(now it only has 9 variables)

[One of the variables in mdata mysteriously disappeared.]

This does not always happen, nor is the same variable always deleted.
Has anyone heard of this happening and/or  does anyone know why?

We tried updating STata 10 (today), that did not help.

Al Feiveson

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