#2 Sample Extension have so bugs!

[Anonymous]

Description of problem:

Version-Release number of selected component (if applicable):

Steps to Reproduce:

Actual Results:

Expected Results:

Additional info:

java.lang.NullPointerException
at graphlab.gui.plugins.reports.extension.GraphReportExtensionAction.performJob(Unknown
Source)
at graphlab.ui.AbstractExtensionAction.doJob(Unknown Source)
at graphlab.main.core.BlackBoard.BlackBoard.fireListeners(Unknown Source)
at graphlab.main.core.BlackBoard.BlackBoard.set(Unknown Source)
at graphlab.ui.actions.UIEventHandler.sendEventToAction(Unknown Source)
at graphlab.ui.actions.UIEventHandler.performJob(Unknown Source)
at graphlab.main.core.action.AbstractAction.doJob(Unknown Source)
at graphlab.main.core.BlackBoard.BlackBoard.fireListeners(Unknown Source)
at graphlab.main.core.BlackBoard.BlackBoard.set(Unknown Source)
at graphlab.ui.components.gmenu.GMenuItem.actionPerformed(Unknown Source)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.AbstractButton.doClick(Unknown Source)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)