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Re: st: value label __MERGE for _merge already exists


From   Sergiy Radyakin <[email protected]>
To   [email protected]
Subject   Re: st: value label __MERGE for _merge already exists
Date   Wed, 24 Nov 2010 14:52:07 -0500

On Tue, Nov 23, 2010 at 1:14 PM, sara borelli <[email protected]> wrote:
> Dear Statalister
> when I merge two datasets using mmerge I get the following mmessage
>
> value label __MERGE for _merge already exists
>
> the merge seems to work ok, but the obs from different datasets instead of getting labeled in the traditional way  like
>  obs only in master data                (code==1)
>  obs only in using data                 (code==2)
>  obs both in master and using data      (code==3)
>
> have just  obs  1          (code==1)
>           obs 2           (code==2)
>           obs 3           (code==3)
>
> This is happening only with some datasets, but I do not know exactly why.
> is there a way to eliminate this new label of merge?


1. Check if any of the two datasets being merged has the __MERGE label defined
already. Drop such before merging.

2. See if the problem occurs when you use standard -merge- instead of -mmerge-

Best, Sergiy Radyakin


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