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Component ID .... has already been found in the view with t:dataScroller.

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I am attempting to use the paged, sortable table using Tomahawk's t:dataScroller. I am deploying this in Glassfish app server inside a portlet.

When I first view the page, there are no issues, the table is rendered properly. After the first rendering, if I refresh the page, it throws the following exception:

"java.lang.IllegalStateException: Component ID j_id_id8:studentScrollfirst has already been found in the view. See below for details...."

My JSP page looks like the follows:

department managed bean is configured as following in faces-config.xml:

Am I missing something?

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I have exactly the same problem. I can not find out what the reason is.
It seems when I remove some elements the page works fine, but after I added some more elements I run again in the problem.
I updated all my JSF Libaries. Now I am using:

myfaces-api 1.2.3
myfaces-impl 1.2.3
tomahawk 1.1.6
jsf-facelets 1.1.14

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