created an attachment (id=160887)
screenshot

description:
exception is thrown out when run org.eclipse.birt.report.tests.chart\src\org\eclipse\birt\report\tests\chart\interactivity\swinghighlightviewer.java and select line chart.

build number:
2.6.0.v20100304-0630

steps to reproduce:
1. run org.eclipse.birt.report.tests.chart\src\org\eclipse\birt\report\tests\chart\interactivity\swinghighlightviewer.java.
2. select line and click "update".

expected result:
no exception.

actual result:
exception is thrown out.

error log:
see the screenshot.
exception is thrown out when run swingshowtooltipviewer.java and select line chart.
this issue is caused by qa change, and the code under this test plugin is maintained by qa team.
fix the problem
verified in build (2.6.0.v20100318-1009), closed.