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This exception has no message.
java.lang.NullPointerException at oracle.as.install.engine.modules.handler.engine.HandlerLauncher.execute(HandlerLauncher.java:207) at oracle.as.install.engine.modules.handler.engine.HandlerEngine.execute(HandlerEngine.java:137) at oracle.as.install.engine.modules.handler.HandlerModule.performOperation(HandlerModule.java:455) at oracle.as.install.engine.modules.handler.HandlerModule.performInputValidations(HandlerModule.java:413) at oracle.as.install.engine.modules.handler.HandlerModule.processModuleEvent(HandlerModule.java:332) at oracle.as.install.engine.modules.util.PartnerModuleImpl.processEvent(PartnerModuleImpl.java:118) at oracle.as.install.engine.InstallEngine.notifyListeners(InstallEngine.java:629) at oracle.as.install.engine.InstallEngine.processEvent(InstallEngine.java:587) at oracle.as.install.engine.modules.util.PartnerModuleImpl.notifyAllEventListenersHelper(PartnerModuleImpl.java:227) at oracle.as.install.engine.modules.util.PartnerModuleImpl.notifyListeners(PartnerModuleImpl.java:191) at oracle.as.install.engine.modules.presentation.PresentationModule.executeModifiedDWizardEvent(PresentationModule.java:717) at oracle.as.install.engine.modules.presentation.ui.common.wizard.ModifiedDWizard.fireValidationEvent(ModifiedDWizard.java:3311) at oracle.as.install.engine.modules.presentation.ui.common.wizard.ModifiedDWizard.doNext(ModifiedDWizard.java:960) at oracle.bali.ewt.wizard.BaseWizard$Action.actionPerformed(Unknown Source) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236) at java.awt.Component.processMouseEvent(Component.java:6297) at javax.swing.JComponent.processMouseEvent(JComponent.java:3275) at java.awt.Component.processEvent(Component.java:6062) at java.awt.Container.processEvent(Container.java:2039) at java.awt.Component.dispatchEventImpl(Component.java:4660) at java.awt.Container.dispatchEventImpl(Container.java:2097) at java.awt.Component.dispatchEvent(Component.java:4488) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4575) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4236) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4166) at java.awt.Container.dispatchEventImpl(Container.java:2083) at java.awt.Window.dispatchEventImpl(Window.java:2489) at java.awt.Component.dispatchEvent(Component.java:4488) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:668) at java.awt.EventQueue.access$400(EventQueue.java:81) at java.awt.EventQueue$2.run(EventQueue.java:627) at java.awt.EventQueue$2.run(EventQueue.java:625) at java.security.AccessController.doPrivileged(Native Method) at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87) at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98) at java.awt.EventQueue$3.run(EventQueue.java:641) at java.awt.EventQueue$3.run(EventQueue.java:639) at java.security.AccessController.doPrivileged(Native Method) at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87) at java.awt.EventQueue.dispatchEvent(EventQueue.java:638) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161) at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)