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This bug was originally marked as duplicate of bug 127368, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 8.0 (Build 201403101706) VM: Java HotSpot(TM) 64-Bit Server VM, 25.20-b23, Java(TM) SE Runtime Environment, 1.8.0_20-b26 OS: Windows 7 User Comments: sschwandter: Tried to open "Help Contents" via "Help" menu Stacktrace: java.lang.IllegalArgumentException: view is invalid at javax.help.search.MergingSearchEngine.merge(MergingSearchEngine.java:91) at javax.help.JHelpSearchNavigator.merge(JHelpSearchNavigator.java:168) at javax.help.plaf.basic.BasicSearchNavigatorUI.addSubHelpSets(BasicSearchNavigatorUI.java:275) at javax.help.plaf.basic.BasicSearchNavigatorUI.reloadData(BasicSearchNavigatorUI.java:225) at javax.help.plaf.basic.BasicSearchNavigatorUI.installUI(BasicSearchNavigatorUI.java:174) at javax.swing.JComponent.setUI(JComponent.java:663)
Created attachment 149002 [details] stacktrace
I'm sorry, I cannot reproduce this bug. Is the exception thrown every time you try to invoke "Help Contents" (it could be caused by some of installed plugins), or does it appear randomly? Thank you.
Closing as incomplete. Please reopen if you can provide some additional information. Thank you for understanding.