[rules-users] org.eclipse.jface.text.Assert$AssertionFailedException: Assertion failed:

Folks, Using 4.0.1. Getting errors sometimes while working with DRL file with "Outline" view open. Errors manifest themselves as a popup box : Here is the content of Error Log: ---------- eclipse.buildId=unknown java.fullversion=J2RE 1.5.0 IBM J9 2.3 Windows XP x86-32 j9vmwi3223ifx-20070323 (JIT enabled) J9VM - 20070322_12058_lHdSMR JIT - 20070109_1805ifx3_r8 GC - WASIFIX_2007 BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_US Framework arguments: -product com.ibm.rational.rad.product.ide Command-line arguments: -os win32 -ws win32 -arch x86 -product com.ibm.rational.rad.product.ide Error Mon Sep 24 18:18:04 EDT 2007 Problems occurred when invoking code from plug-in: "org.eclipse.ui.views". org.eclipse.jface.text.Assert$AssertionFailedException: Assertion failed: at org.eclipse.jface.text.Assert.isTrue(Unknown Source) at org.eclipse.jface.text.Assert.isTrue(Unknown Source) at org.eclipse.jface.text.rules.FastPartitioner.connect(Unknown Source) at org.eclipse.jface.text.rules.FastPartitioner.connect(Unknown Source) at org.drools.eclipse.editors.DRLDocumentProvider.getDocument(Unknown Source) at org.eclipse.ui.texteditor.TextSelectionNavigationLocation.getDocument(Un known Source) at org.eclipse.ui.texteditor.TextSelectionNavigationLocation.<init>(Unknown Source) at org.eclipse.ui.texteditor.AbstractTextEditor.createNavigationLocation(Un known Source) at org.eclipse.ui.internal.NavigationHistory.addEntry(Unknown Source) at org.eclipse.ui.internal.NavigationHistory.markLocation(Unknown Source) at org.eclipse.ui.texteditor.AbstractTextEditor.markInNavigationHistory(Unk nown Source) at org.eclipse.ui.texteditor.AbstractTextEditor.selectAndReveal(Unknown Source) at org.eclipse.ui.texteditor.AbstractTextEditor.selectAndReveal(Unknown Source) at org.drools.eclipse.editors.outline.RuleContentOutlinePage$1.selectionCha nged(Unknown Source) at org.eclipse.ui.views.contentoutline.ContentOutlinePage$1.run(Unknown Source) at org.eclipse.core.runtime.SafeRunner.run(Unknown Source) at org.eclipse.core.runtime.Platform.run(Unknown Source) at org.eclipse.ui.views.contentoutline.ContentOutlinePage.fireSelectionChan ged(Unknown Source) at org.eclipse.ui.views.contentoutline.ContentOutlinePage.selectionChanged( Unknown Source) at org.eclipse.jface.viewers.Viewer$2.run(Unknown Source) at org.eclipse.core.runtime.SafeRunner.run(Unknown Source) at org.eclipse.core.runtime.Platform.run(Unknown Source) at org.eclipse.ui.internal.JFaceUtil$1.run(Unknown Source) at org.eclipse.jface.util.SafeRunnable.run(Unknown Source) at org.eclipse.jface.viewers.Viewer.fireSelectionChanged(Unknown Source) at org.eclipse.jface.viewers.StructuredViewer.updateSelection(Unknown Source) at org.eclipse.jface.viewers.StructuredViewer.handleSelect(Unknown Source) at org.eclipse.jface.viewers.StructuredViewer$4.widgetSelected(Unknown Source) at org.eclipse.jface.util.OpenStrategy.fireSelectionEvent(Unknown Source) at org.eclipse.jface.util.OpenStrategy.access$3(Unknown Source) at org.eclipse.jface.util.OpenStrategy$1.handleEvent(Unknown Source) at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source) at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source) at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source) at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source) at org.eclipse.ui.internal.Workbench.runEventLoop(Unknown Source) at org.eclipse.ui.internal.Workbench.runUI(Unknown Source) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Unknown Source) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(Unknown Source) at org.eclipse.ui.internal.ide.IDEApplication.run(Unknown Source) at org.eclipse.core.internal.runtime.PlatformActivator$1.run(Unknown Source) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplicat ion(Unknown Source) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(Unkno wn Source) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(Unknown Source) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(Unknown Source) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.core.launcher.Main.invokeFramework(Unknown Source) at org.eclipse.core.launcher.Main.basicRun(Unknown Source) at org.eclipse.core.launcher.Main.run(Unknown Source) at org.eclipse.core.launcher.Main.main(Unknown Source) ********************** ** LEGAL DISCLAIMER ** ********************** This E-mail message and any attachments may contain legally privileged, confidential or proprietary information. 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