java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at oracle.jbo.dt.ui.view.VOAttributePanel.getFieldType(VOAttributePanel.java:687)
at oracle.jbo.dt.ui.view.VOAttributePanel.updateAttribute(VOAttributePanel.java:496)
at oracle.jbo.dt.ui.view.VOAttributePanel.leave(VOAttributePanel.java:234)
at oracle.jbo.dt.ui.view.VOEditAttributePanel.updateCurrentAttr(VOEditAttributePanel.java:256)
at oracle.jbo.dt.ui.view.VOEditAttributePanel.leave(VOEditAttributePanel.java:104)
at oracle.jbo.dt.ui.main.dlg.DtuWizard.wizardValidatePage(DtuWizard.java:1679)
at oracle.bali.ewt.wizard.WizardPage.processWizardValidateEvent(Unknown Source)
at oracle.bali.ewt.wizard.WizardPage.validatePage(Unknown Source)
at oracle.bali.ewt.wizard.BaseWizard.validateSelectedPage(Unknown Source)
at oracle.bali.ewt.wizard.BaseWizard.doNext(Unknown Source)
at oracle.bali.ewt.wizard.BaseWizard$Action.actionPerformed(Unknown Source)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1786)
at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1839)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:245)
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.pumpEventsForHierarchy(EventDispatchThread.java:141)
at java.awt.Dialog$1.run(Dialog.java:540)
at java.awt.Dialog.show(Dialog.java:561)
at java.awt.Component.show(Component.java:1133)
at java.awt.Component.setVisible(Component.java:1088)
at oracle.bali.ewt.wizard.WizardDialog.runDialog(Unknown Source)
at oracle.jbo.dt.ui.main.dlg.DtuWizard.createBaliWizard(DtuWizard.java:330)
at oracle.jbo.dt.ui.main.dlg.DtuWizard.setVisible(DtuWizard.java:272)
at oracle.jbo.dt.ui.main.dlg.DtuWizard.showDialog(DtuWizard.java:254)
at oracle.jbo.dt.jdevx.ui.JdxMenuManager.invokeVOWizard(JdxMenuManager.java:616)
at oracle.jbo.dt.jdevx.ui.JdxMenuManager.invokeViewWizard(JdxMenuManager.java:608)
at oracle.jbo.dt.jdevx.ui.JdxVOAddin.invoke(JdxVOAddin.java:38)
at oracle.ide.WizardManager$1.run(WizardManager.java:450)
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.pumpEvents(EventDispatchThread.java:145)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)

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