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http://issues.apache.org/jira/browse/MYFACES-1020?page=comments#action_12362715 
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Daniel Ray commented on MYFACES-1020:
-------------------------------------

My apologies. I could have sworn that I left sample code. I don't have the code 
on hand at the moment so I can't simply repost it. I had a total of four 
dataTables. Two dataTables existed in one panelGrid and the other two existed 
in another panelGrid (Side by side comparison). I did not manually set the ids 
either. I only noticed it after posting a problem when using a dataList 
http://issues.apache.org/jira/browse/MYFACES-1009 Code is posted there). The UI 
requirement has changed since I posted the bug and I am now using one dataTable 
and one dataList on the screen and don't have the problem anymore because I'm 
using the layout attribute of dataList to number the rows.

What I recall is that one dataTable would number 1 - 4 and the next dataTable 
would begin at 5. I also recall that if the second dataTable had multiple rows 
that the numbering would be the same and not incremented i.e. 5, 5, 5 and if 
I'm not mistaken I repopulated the two lists and saw the first table 1-4 and 
the second table start at 8 ???

Many thanks for digging deeper and finding the root problem. It may also 
explain the problem with http://issues.apache.org/jira/browse/MYFACES-814. I'm 
using MyEclipseIde plugin (4.1m2) on Linux and lose my patience easily when 
debugging taglibs (The plugin is much more robust on Windows). 

-Ray

> Having multiple dataTables on a single page increments the rowCountVar 
> incorrectly.
> -----------------------------------------------------------------------------------
>
>          Key: MYFACES-1020
>          URL: http://issues.apache.org/jira/browse/MYFACES-1020
>      Project: MyFaces
>         Type: Bug
>   Components: Tomahawk
>     Versions: 1.1.1
>     Reporter: Daniel Ray
>     Priority: Minor

>
> Having multiple dataTables on a single page increments the rowCountVar 
> incorrectly. First dataTable increments as expected, but the second dataTable 
> will pick up the count where the first dataTable left off. Ensuring unique 
> rowCountVar names does not appear to help.

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