Error when trying to reopen a page in Jdev after making changes

Question

Message
BME-99003: An error occurred, so processing could not continue.
Cause
The application has tried to de-reference an invalid pointer. This exception should have been dealt with programmatically. The current activity may fail and the system may have been left in an unstable state. The following is a stack trace.
java.lang.NullPointerException
     at oracle.jdevimpl.webapp.model.content.dom.xml.XElement.getAttrQName(XElement.java:250)
     at oracle.jdevimpl.webapp.model.content.dom.xml.XElement._getAttributeValue(XElement.java:176)
     at oracle.jdevimpl.webapp.model.content.dom.xml.XElement.getAttributeValue(XElement.java:146)
     at oracle.jdevimpl.webapp.model.content.dom.xml.XElement.getAttributeValue(XElement.java:141)
     at oracle.jdevimpl.webapp.model.content.dom.view.proxy.ONodeProxy.getAttributeValue(ONodeProxy.java:124)
     at oracle.jdevimpl.webapp.model.css.html.LinkedStyleSheet.getHref(LinkedStyleSheet.java:120)
     at oracle.jdevimpl.webapp.model.css.html.LinkedStyleSheet.getProducer(LinkedStyleSheet.java:230)
     at oracle.jdevimpl.webapp.model.css.html.LinkedStyleSheet.getResourceProducer(LinkedStyleSheet.java:133)
     at oracle.jdevimpl.webapp.editor.StyleSheetChangeObserver.addStyleNodeObservers(StyleSheetChangeObserver.java:96)
     at oracle.jdevimpl.webapp.editor.StyleSheetChangeObserver.startListening(StyleSheetChangeObserver.java:80)
     at oracle.jdevimpl.webapp.editor.StyleSheetChangeObserver.activate(StyleSheetChangeObserver.java:70)
     at oracle.jdevimpl.webapp.editor.StyleSheetChangeObserver.activate(StyleSheetChangeObserver.java:54)
     at oracle.jdevimpl.webapp.editor.AbstractWebAppEditor.attachStyleSheetObservers(AbstractWebAppEditor.java:1434)
     at oracle.jdevimpl.webapp.editor.AbstractWebAppEditor.postViewDocumentActivated(AbstractWebAppEditor.java:1271)
     at oracle.jdevimpl.webapp.editor.AbstractWebAppEditor.activateViewDocument(AbstractWebAppEditor.java:1239)
     at oracle.jdevimpl.webapp.editor.AbstractWebAppEditor.createDocuments(AbstractWebAppEditor.java:1174)
     at oracle.jdevimpl.webapp.editor.AbstractWebAppEditor.open(AbstractWebAppEditor.java:364)
     at oracle.jdevimpl.webapp.editor.html.HtmlEditor.open(HtmlEditor.java:172)
     at oracle.jdevimpl.webapp.editor.jsp.JspEditor.open(JspEditor.java:113)
     at oracle.ideimpl.editor.EditorState.openEditor(EditorState.java:240)
     at oracle.ideimpl.editor.EditorState.createEditor(EditorState.java:148)
     at oracle.ideimpl.editor.EditorState.getOrCreateEditor(EditorState.java:91)
     at oracle.ideimpl.editor.SplitPaneState.canSetEditorStatePos(SplitPaneState.java:231)
     at oracle.ideimpl.editor.SplitPaneState.setCurrentEditorStatePos(SplitPaneState.java:194)
     at oracle.ideimpl.editor.TabGroupState.createSplitPaneState(TabGroupState.java:103)
     at oracle.ideimpl.editor.TabGroup.addTabGroupState(TabGroup.java:278)
     at oracle.ideimpl.editor.EditorManagerImpl.createEditor(EditorManagerImpl.java:1261)
     at oracle.ideimpl.editor.EditorManagerImpl.createEditor(EditorManagerImpl.java:1196)
     at oracle.ideimpl.editor.EditorManagerImpl.openEditorInFrame(EditorManagerImpl.java:1077)
     at oracle.ideimpl.editor.EditorManagerImpl.openDefaultEditorInFrame(EditorManagerImpl.java:1036)
     at oracle.adfdt.controller.util.CommonUtils.showEditor(CommonUtils.java:575)
     at oracle.adfdt.controller.jsf.diagram.shape.PageNode.gotoPage(PageNode.java:347)
     at oracle.adfdt.controller.diagram.model.MenuActions.gotoPage(MenuActions.java:459)
     at oracle.adfdt.controller.diagram.model.MenuActions.access$200(MenuActions.java:23)
     at oracle.adfdt.controller.diagram.model.MenuActions$2.onCheckedCmdUIEvent(MenuActions.java:174)
     at oracle.bm.diagrammer.cmdUI.CmdUIReceiver$Checked.onCmdUIEvent(Unknown Source)
     at oracle.bm.diagrammer.BaseDiagram$14.onCmdUIEvent(Unknown Source)
     at oracle.bm.addinUtil.IDEAppContext.handledElseWhere(Unknown Source)
     at oracle.bm.addinUtil.IDEAppContext.onCmdUI(Unknown Source)
     at oracle.bm.addinUtil.IDEAppContext.handleEvent(Unknown Source)
     at oracle.ide.controller.IdeAction.performAction(IdeAction.java:525)
     at oracle.ide.controller.IdeAction$1.run(IdeAction.java:772)
     at oracle.ide.controller.IdeAction.actionPerformedImpl(IdeAction.java:789)
     at oracle.ide.controller.IdeAction.actionPerformed(IdeAction.java:498)
     at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1849)
     at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2169)
     at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:420)
     at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:258)
     at javax.swing.AbstractButton.doClick(AbstractButton.java:302)
     at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1000)
     at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1041)
     at java.awt.Component.processMouseEvent(Component.java:5488)
     at javax.swing.JComponent.processMouseEvent(JComponent.java:3126)
     at java.awt.Component.processEvent(Component.java:5253)
     at java.awt.Container.processEvent(Container.java:1966)
     at java.awt.Component.dispatchEventImpl(Component.java:3955)
     at java.awt.Container.dispatchEventImpl(Container.java:2024)
     at java.awt.Component.dispatchEvent(Component.java:3803)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3892)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
     at java.awt.Container.dispatchEventImpl(Container.java:2010)
     at java.awt.Window.dispatchEventImpl(Window.java:1774)
     at java.awt.Component.dispatchEvent(Component.java:3803)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
     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)
Action
If further errors occur, you should restart the application.
Also, report the problem on the JDeveloper forum on otn.oracle.com, or contact Oracle support, giving the information from this message.
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Answer 1

I'm having the same problem in Business Objects 4 BI Launch Pad with reports that were created in CR 2011.
The viewer could not process an event. Error in File Buyer Status:
Encapsulating page failed. []
Error code:0 [CRWEB00000119]
The interesting thing is that I have a test platform where all my reports work correctly.  However, all these reports fail with the error message on my production platform.
On the production platform, I can run these reports from CMC without any errors.  I suspect that something about my Single Sign-On to database configuration is not correct.
So far, I have been unable to detect any significant differences between the working test platform and the failing production platform.