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java.lang.NullPointerException: 	at javax.swing.text.FlowView.changedUpdate(FlowView.java:264)	at javax.swing.text.ParagraphView.changedUpdate(ParagraphView.java:680)	at javax.swing.text.View.forwardUpdateToView(View.java:1221)	at javax.swing.text.View.forwardUpdate(View.java:1192)	at javax.swing.text.BoxView.forwardUpdate(BoxView.java:222)	at javax.swing.text.View.changedUpdate(View.java:798)	at javax.swing.plaf.basic.BasicTextUI$RootView.changedUpdate(BasicTextUI.java:1515)	at javax.swing.plaf.basic.BasicTextUI$UpdateHandler.changedUpdate(BasicTextUI.java:1756)	at javax.swing.text.AbstractDocument.fireChangedUpdate(AbstractDocument.java:213)	at javax.swing.text.DefaultStyledDocument$ChangeUpdateRunnable.run(DefaultStyledDocument.java:2477)	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:454)	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:141)	at java.awt.Dialog$1.run(Dialog.java:540)	at java.awt.Dialog.show(Dialog.java:561)	at mypackage.dialogs.TemplateDialog.show(TemplateDialog.java:282)	at mypackage.program.initOpenTemplate(designondemand.java:574)	at mypackage.commands.cmdOpenTemplate.actionPerformed(cmdOpenTemplate.java:29)	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1786)	at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1839)	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)	at javax.swing.AbstractButton.doClick(AbstractButton.java:289)	at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1113)	at javax.swing.plaf.basic.BasicMenuItemUI$MouseInputHandler.mouseReleased(BasicMenuItemUI.java:943)	at java.awt.Component.processMouseEvent(Component.java:5100)	at java.awt.Component.processEvent(Component.java:4897)	at java.awt.Container.processEvent(Container.java:1569)	at java.awt.Component.dispatchEventImpl(Component.java:3615)	at java.awt.Container.dispatchEventImpl(Container.java:1627)	at java.awt.Component.dispatchEvent(Component.java:3477)	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3483)	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3198)	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3128)	at java.awt.Container.dispatchEventImpl(Container.java:1613)	at java.awt.Window.dispatchEventImpl(Window.java:1606)	at java.awt.Component.dispatchEvent(Component.java:3477)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:456)	at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)