Java Development Tools

I'm getting "Copy operation failed, may not be able to calcel some edits"


java.lang.NullPointerException
at oracle.jbo.dt.objects.JboView.loadDoneCopyTo(JboView.java:6118)
at oracle.jbo.dt.objects.CloneService.copyObject(CloneService.java:123)
at oracle.jbo.dt.objects.CloneService.cloneObject(CloneService.java:53)
at oracle.jbo.dt.objects.JboNamedObject.cloneObject(JboNamedObject.java:562)
at oracle.jbo.dt.ui.main.DtuUtil.cloneObject(DtuUtil.java:704)
at oracle.jbo.dt.ui.view.VOWizard.<init>(VOWizard.java:82)
at oracle.jbo.dt.jdevx.ui.JdxMenuManager.invokeVOWizard(JdxMenuManager.java:991)
at oracle.jbo.dt.jdevx.ui.JdxMenuManager.invokeViewWizard(JdxMenuManager.java:984)
at oracle.jbo.dt.ui.main.DtuMenuManager.doEditMenuAction(DtuMenuManager.java:1399)
at oracle.jbo.dt.ui.main.DtuMenuManager.doMenuAction(DtuMenuManager.java:1320)
at oracle.jbo.dt.jdevx.ui.JdxMenuManager.doMenuAction(JdxMenuManager.java:882)
at oracle.jbo.dt.ui.main.DtuMenuManager.doAction(DtuMenuManager.java:1156)
at oracle.jbo.dt.ui.main.DtuMenuManager.doAction(DtuMenuManager.java:1141)
at oracle.jbo.dt.jdevx.ui.JdxMenuManager.doActionPerformed(JdxMenuManager.java:682)
at oracle.jbo.dt.jdevx.ui.JdxMenuInvoker.run(JdxMenuManager.java:1733)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)


What can be done to fix it?