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This exception has no message.
java.lang.NullPointerException: 	at com.sun.jbi.ui.devtool.etl.ui.view.wizards.ETLCollaborationWizardTransferPanel$ListTransferModel.add(ETLCollaborationWizardTransferPanel.java:213)	at com.sun.jbi.ui.devtool.etl.ui.view.wizards.ETLCollaborationWizardTransferPanel$3.mouseClicked(ETLCollaborationWizardTransferPanel.java:847)	at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:253)	at java.awt.Component.processMouseEvent(Component.java:6041)	at javax.swing.JComponent.processMouseEvent(JComponent.java:3260)	at java.awt.Component.processEvent(Component.java:5803)	at java.awt.Container.processEvent(Container.java:2058)	at java.awt.Component.dispatchEventImpl(Component.java:4410)	at java.awt.Container.dispatchEventImpl(Container.java:2116)	at java.awt.Component.dispatchEvent(Component.java:4240)	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3995)	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)	at java.awt.Container.dispatchEventImpl(Container.java:2102)	at java.awt.Window.dispatchEventImpl(Window.java:2429)	at java.awt.Component.dispatchEvent(Component.java:4240)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:177)	at java.awt.Dialog$1.run(Dialog.java:1039)	at java.awt.Dialog$3.run(Dialog.java:1091)	at java.security.AccessController.doPrivileged(Native Method)	at java.awt.Dialog.show(Dialog.java:1089)	at org.netbeans.core.windows.services.NbPresenter.superShow(NbPresenter.java:816)