[rules-users] Internal error in Drools Plugin

Environment ----------------- Windows 7 64bit Java 1.6 JRE Eclipse SDK 3.5.2 GEF 3.5.2 Drools 5.1 GA Eclipse Workbench When importing a very simple drools project ( a personal implementation of the classic fibonacci problem), which had worked fine without any build or runtime errors when using drools 5.0, I received the following two build errors in the Eclipse environment. I tried looking on the Nabble news group but did not find any similar postings. Also Googled the errors but to no avail. Any help would be very much appreciated. Thanks. ERROR #1 ----------- Internal error in Drools plugin: org.drools.RuntimeDroolsException: value '1.4' is not a valid language level at org.drools.rule.builder.dialect.java.JavaDialectConfiguration.setJavaLanguageLevel(JavaDialectConfiguration.java:79) at org.drools.eclipse.DroolsEclipsePlugin.generateParsedResource(Unknown Source) at org.drools.eclipse.DroolsEclipsePlugin.generateParsedResource(Unknown Source) at org.drools.eclipse.DroolsEclipsePlugin.parseResource(Unknown Source) at org.drools.eclipse.editors.DroolsLineBreakpointAdapter.canToggleLineBreakpoints(Unknown Source) at org.eclipse.debug.ui.actions.ToggleBreakpointAction.update(ToggleBreakpointAction.java:187) at org.eclipse.ui.texteditor.AbstractRulerActionDelegate.update(AbstractRulerActionDelegate.java:132) at org.eclipse.ui.texteditor.AbstractRulerActionDelegate.setActiveEditor(AbstractRulerActionDelegate.java:89) at org.eclipse.debug.ui.actions.RulerToggleBreakpointActionDelegate.setActiveEditor(RulerToggleBreakpointActionDelegate.java:98) at org.eclipse.ui.internal.EditorPluginAction.editorChanged(EditorPluginAction.java:75) at org.eclipse.ui.internal.EditorActionBuilder$EditorContribution.editorChanged(EditorActionBuilder.java:83) at org.eclipse.ui.internal.EditorActionBuilder$ExternalContributor.setActiveEditor(EditorActionBuilder.java:129) at org.eclipse.ui.internal.EditorActionBars.partChanged(EditorActionBars.java:345) at org.eclipse.ui.internal.WorkbenchPage$3.run(WorkbenchPage.java:632) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.runtime.Platform.run(Platform.java:888) at org.eclipse.ui.internal.WorkbenchPage.activatePart(WorkbenchPage.java:621) at org.eclipse.ui.internal.WorkbenchPage.setActivePart(WorkbenchPage.java:3527) at org.eclipse.ui.internal.WorkbenchPage.activate(WorkbenchPage.java:614) at org.eclipse.ui.internal.WorkbenchPage.showEditor(WorkbenchPage.java:2943) at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2843) at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2762) at org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPage.java:2754) at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2705) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2701) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2685) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2676) at org.eclipse.ui.ide.IDE.openEditor(IDE.java:651) at org.eclipse.ui.ide.IDE.openEditor(IDE.java:610) at org.eclipse.ui.ide.IDE.openEditor(IDE.java:1105) at org.eclipse.ui.internal.views.markers.ExtendedMarkersView.openMarkerInEditor(ExtendedMarkersView.java:254) at org.eclipse.ui.internal.views.markers.ExtendedMarkersView.openSelectedMarkers(ExtendedMarkersView.java:1572) at org.eclipse.ui.internal.views.markers.ExtendedMarkersView$4.open(ExtendedMarkersView.java:568) at org.eclipse.ui.OpenAndLinkWithEditorHelper$InternalListener.open(OpenAndLinkWithEditorHelper.java:48) at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:842) at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) at org.eclipse.core.runtime.Platform.run(Platform.java:888) at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:48) at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175) at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:840) at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:1101) at org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:1205) at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:264) at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:258) at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:298) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1003) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3910) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3503) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2405) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:368) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) 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.equinox.launcher.Main.invokeFramework(Main.java:559) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514) at org.eclipse.equinox.launcher.Main.run(Main.java:1311) at org.eclipse.equinox.launcher.Main.main(Main.java:1287) ERROR #2 ---------- Unable to create view ID org.eclipse.ui.views.ContentOutline: value '1.4' is not a valid language level: org.drools.RuntimeDroolsException: value '1.4' is not a valid language level at org.drools.rule.builder.dialect.java.JavaDialectConfiguration.setJavaLanguageLevel(JavaDialectConfiguration.java:79) at org.drools.eclipse.DroolsEclipsePlugin.generateParsedResource(Unknown Source) at org.drools.eclipse.DroolsEclipsePlugin.parseResource(Unknown Source) at org.drools.eclipse.editors.outline.RuleContentOutlinePage.initRules(Unknown Source) at org.drools.eclipse.editors.outline.RuleContentOutlinePage.update(Unknown Source) at org.drools.eclipse.editors.outline.RuleContentOutlinePage.createControl(Unknown Source) at org.eclipse.ui.views.contentoutline.ContentOutline.doCreatePage(ContentOutline.java:137) at org.eclipse.ui.part.PageBookView.createPage(PageBookView.java:409) at org.eclipse.ui.part.PageBookView.partActivated(PageBookView.java:752) at org.eclipse.ui.part.PageBookView.showBootstrapPart(PageBookView.java:921) at org.eclipse.ui.part.PageBookView.createPartControl(PageBookView.java:492) at org.eclipse.ui.views.contentoutline.ContentOutline.createPartControl(ContentOutline.java:121) at org.eclipse.ui.internal.ViewReference.createPartHelper(ViewReference.java:367) at org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java:226) at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:595) at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:313) at org.eclipse.ui.internal.ViewPane.setVisible(ViewPane.java:529) at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:180) at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:270) at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65) at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:473) at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1256) at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:668) at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:576) at org.eclipse.ui.internal.PartSashContainer.createControl(PartSashContainer.java:568) at org.eclipse.ui.internal.PerspectiveHelper.activate(PerspectiveHelper.java:272) at org.eclipse.ui.internal.Perspective.onActivate(Perspective.java:982) at org.eclipse.ui.internal.WorkbenchPage.onActivate(WorkbenchPage.java:2626) at org.eclipse.ui.internal.WorkbenchWindow$27.run(WorkbenchWindow.java:2965) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.ui.internal.WorkbenchWindow.setActivePage(WorkbenchWindow.java:2946) at org.eclipse.ui.internal.WorkbenchWindow$21.runWithException(WorkbenchWindow.java:2263) at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:134) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3885) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3506) at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:803) at org.eclipse.ui.internal.Workbench$28.runWithException(Workbench.java:1384) at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31) at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35) at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:134) at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3885) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3506) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2316) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221) at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:368) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179) 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.equinox.launcher.Main.invokeFramework(Main.java:559) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514) at org.eclipse.equinox.launcher.Main.run(Main.java:1311) at org.eclipse.equinox.launcher.Main.main(Main.java:1287) -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Internal-error-in-Dro... 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