Jdev -Tools -Preference Exception

Question

gurus, in Jdev 11.1.1.5, when clicking on Tools _ Preference i am getting this exception and the window is not opening. Tried restarting JDev but still the same. I was able to open this till yesterday
Jul 21, 2011 5:18:30 PM oracle.ide.controller.IdeAction
SEVERE: Exception peforming action
java.lang.IllegalArgumentException: Attempt to copy from an object of type oracle.jdevimpl.audit.preferences.AuditPreferences to an object of type <null>
     at oracle.javatools.data.HashStructureAdapter.copyTo(HashStructureAdapter.java:95)
     at oracle.javatools.util.ModelUtil.deepCopy(ModelUtil.java:220)
     at oracle.ide.config.ClientSetting.copyToImpl(ClientSetting.java:255)
     at oracle.ide.config.ClientSetting.copyTo(ClientSetting.java:249)
     at oracle.javatools.util.ModelUtil.deepCopy(ModelUtil.java:220)
     at oracle.ide.config.IdeSettings.copyToImpl(IdeSettings.java:203)
     at oracle.ide.config.IdeSettings.copyTo(IdeSettings.java:196)
     at oracle.ide.config.IdeSettings.showDialog(IdeSettings.java:783)
     at oracle.ide.config.IdeSettings.showDialog(IdeSettings.java:593)
     at oracle.ide.cmd.IdeSettingsCommand.doit(IdeSettingsCommand.java:45)
     at oracle.ide.controller.CommandProcessor.invoke(CommandProcessor.java:317)
     at oracle.ide.controller.IdeAction.performAction(IdeAction.java:556)
     at oracle.ide.controller.IdeAction.actionPerformedImpl(IdeAction.java:884)
     at oracle.ide.controller.IdeAction.actionPerformed(IdeAction.java:501)
     at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
     at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
     at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
     at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
     at javax.swing.AbstractButton.doClick(AbstractButton.java:357)
     at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:809)
     at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:850)
     at java.awt.Component.processMouseEvent(Component.java:6289)
     at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
     at java.awt.Component.processEvent(Component.java:6054)
     at java.awt.Container.processEvent(Container.java:2041)
     at java.awt.Component.dispatchEventImpl(Component.java:4652)
     at java.awt.Container.dispatchEventImpl(Container.java:2099)
     at java.awt.Component.dispatchEvent(Component.java:4482)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4577)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
     at java.awt.Container.dispatchEventImpl(Container.java:2085)
     at java.awt.Window.dispatchEventImpl(Window.java:2478)
     at java.awt.Component.dispatchEvent(Component.java:4482)
     at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:644)
     at java.awt.EventQueue.access$000(EventQueue.java:85)
     at java.awt.EventQueue$1.run(EventQueue.java:603)
     at java.awt.EventQueue$1.run(EventQueue.java:601)
     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$2.run(EventQueue.java:617)
     at java.awt.EventQueue$2.run(EventQueue.java:615)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:614)
     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)

Answer 1

chk this
Re: Can't open preferences dialog, I receive the following exception.
can u remove the following entry from preferences.xml in C:\Documents and Settings\user\Application Data\JDeveloper\system11.1.1.4.37.59.23\o.jdeveloper
Item>
<Key>audit-preferences</Key>
<Value class="oracle.jdevimpl.audit.preferences.AuditPreferences">
<assistProfile/>
<auditDuringCompile>false</auditDuringCompile>
<auditWhileEditing>true</auditWhileEditing>
<compileProfile/>
<editorDelay>700</editorDelay>
<maximumFileSize>5.0</maximumFileSize>
<showCodeAssistanceInGutter>true</showCodeAssistanceInGutter>
</Value>
</Item>