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https://issues.apache.org/jira/browse/PIVOT-101?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12700630#action_12700630
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Todd Volkert commented on PIVOT-101:
------------------------------------

So this happens when the tutorial demo is trying to automatically expand the 
first rollup, meaning that the demo starts up but without the "Buttons" rollup 
expanded.  And because of this error, RadioButton fails to load, and I can't 
expand that rollup henceforth in the demo (I then get NoClassDefFoundError 
because it didn't initialize the class).

Further, if I comment out that automatic expansion and do it manually, I still 
get this issue!  I can't expand any rollup in that demo that uses a button data 
renderer, 'cause I get a variant of this error.

> Exception thrown upon application startup
> -----------------------------------------
>
>                 Key: PIVOT-101
>                 URL: https://issues.apache.org/jira/browse/PIVOT-101
>             Project: Pivot
>          Issue Type: Bug
>          Components: wtk
>         Environment: OSX 10.5.6, DesktopApplicationContext, JRE 
> 1.6.0_07-b06-153
> Possibly others
>            Reporter: Todd Volkert
>            Assignee: Todd Volkert
>            Priority: Critical
>             Fix For: 1.2
>
>
> > java -cp 
> > lib/pivot-core.jar:lib/pivot-wtk.jar:lib/pivot-wtk.terra.jar:lib/pivot-tutorials.jar:wtk/lib/stax-api-1.0.jar:wtk/lib/stax-1.2.0.jar
> >  pivot.wtk.DesktopApplicationContext pivot.tutorials.Demo
> Exception in thread "AWT-EventQueue-0" java.lang.AbstractMethodError: 
> pivot.wtk.content.ButtonDataRenderer.getStyles()Lpivot/collections/Dictionary;
>       at pivot.wtk.RadioButton.<clinit>(RadioButton.java:30)
>       at java.lang.Class.forName0(Native Method)
>       at java.lang.Class.forName(Class.java:169)
>       at pivot.wtkx.WTKXSerializer.readObject(WTKXSerializer.java:414)
>       at pivot.wtkx.WTKXSerializer.readObject(WTKXSerializer.java:167)
>       at pivot.wtkx.WTKXSerializer.readObject(WTKXSerializer.java:158)
>       at 
> pivot.tutorials.Demo$RollupStateHandler.previewExpandedChange(Demo.java:99)
>       at 
> pivot.wtk.Rollup$RollupStateListenerList.previewExpandedChange(Rollup.java:53)
>       at pivot.wtk.Rollup.setExpanded(Rollup.java:108)
>       at pivot.tutorials.Demo$15.run(Demo.java:506)
>       at 
> pivot.wtk.ApplicationContext$ScheduledCallback$1.run(ApplicationContext.java:1114)
>       at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
>       at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
>       at 
> java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:300)
>       at 
> java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:210)
>       at 
> java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:200)
>       at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:195)
>       at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:187)
>       at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)

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