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java.lang.NullPointerException: 	at oracle.dbtools.raptor.ui.URLFileChooser.setCurrentDirectory(URLFileChooser.java:507)	at oracle.dbtools.raptor.ui.URLFileChooser.setToFirstContextPathDirectory(URLFileChooser.java:1491)	at oracle.dbtools.raptor.ui.URLFileChooser.setCurrentDirectoryFromPathContext(URLFileChooser.java:1467)	at oracle.dbtools.raptor.ui.URLFileChooser.setDefaultPathContext(URLFileChooser.java:1533)	at oracle.dbtools.raptor.ui.URLFileChooser.(URLFileChooser.java:130)	at oracle.dbtools.raptor.ui.URLFileChooser.(URLFileChooser.java:114)	at oracle.dbtools.raptor.ui.URLFileChooser.(URLFileChooser.java:110)	at oracle.dbtools.raptor.ui.URLFileChooser.(URLFileChooser.java:106)	at oracle.dbtools.raptor.ui.URLFileChooser$URLFileChooserPanel.(URLFileChooser.java:831)	at oracle.dbtools.raptor.ui.URLFileChooser$URLFileChooserPanel.(URLFileChooser.java:889)	at oracle.dbtools.raptor.ui.URLFileChooser.createURLFileChooserPanel(URLFileChooser.java:794)	at oracle.dbtools.raptor.export.wizard.TargetOptionsPanel.initFilePanel(TargetOptionsPanel.java:237)	at oracle.dbtools.raptor.export.wizard.TargetOptionsPanel.(TargetOptionsPanel.java:63)	at oracle.dbtools.raptor.export.wizard.TargetOptionsPanel.(TargetOptionsPanel.java:55)	at oracle.dbtools.raptor.export.wizard.ExportWizDestinstaionPanel.(ExportWizDestinstaionPanel.java:97)	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)	at java.lang.reflect.Constructor.newInstance(Constructor.java:422)	at oracle.ide.panels.MetaTraversable.newTraversable(MetaTraversable.java:315)	at oracle.ide.wizard.Step.newTraversable(Step.java:171)	at oracle.ide.wizard.FSMStateInfo.getTraversable(FSMStateInfo.java:99)	at oracle.ide.wizard.FSMWizard._addPage(FSMWizard.java:580)	at oracle.ide.wizard.FSMWizard._populatePages(FSMWizard.java:534)	at oracle.ide.wizard.FSMWizard.(FSMWizard.java:121)	at oracle.dbtools.raptor.export.wizard.ExportWizMain.launchWizard(ExportWizMain.java:226)	at oracle.dbtools.raptor.export.wizard.ExportWizMain.launchForGrid(ExportWizMain.java:204)	at oracle.dbtools.raptor.dialogs.actions.TableExportAction.launchForGrid(TableExportAction.java:73)	at oracle.dbtools.raptor.controls.grid.contextmenu.ExportGrid$1.actionPerformed(ExportGrid.java:165)	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2346)	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)	at javax.swing.AbstractButton.doClick(AbstractButton.java:376)	at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)	at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)	at java.awt.Component.processMouseEvent(Component.java:6525)	at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)	at java.awt.Component.processEvent(Component.java:6290)	at java.awt.Container.processEvent(Container.java:2234)	at java.awt.Component.dispatchEventImpl(Component.java:4881)	at java.awt.Container.dispatchEventImpl(Container.java:2292)	at java.awt.Component.dispatchEvent(Component.java:4703)	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898)	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4533)	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462)	at java.awt.Container.dispatchEventImpl(Container.java:2278)	at java.awt.Window.dispatchEventImpl(Window.java:2750)	at java.awt.Component.dispatchEvent(Component.java:4703)	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)	at java.awt.EventQueue.access$500(EventQueue.java:97)	at java.awt.EventQueue$3.run(EventQueue.java:709)	at java.awt.EventQueue$3.run(EventQueue.java:703)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86)	at java.awt.EventQueue$4.run(EventQueue.java:731)	at java.awt.EventQueue$4.run(EventQueue.java:729)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)	at oracle.javatools.internal.ui.EventQueueWrapper._dispatchEvent(EventQueueWrapper.java:169)	at oracle.javatools.internal.ui.EventQueueWrapper.dispatchEvent(EventQueueWrapper.java:151)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)