Eclipse version 3.1
Laszlo IDE version 2.1
Eclipse Pluging 3.0.0 alpha 4a

Once the Hibernate plugin is installed, Can no longer open the editor for Laszlo files.

From Eclipse Log:
!ENTRY org.eclipse.ui.workbench 4 2 2005-08-18 12:36:48.843
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.ui.workbench".
!STACK 0
java.lang.reflect.InvocationTargetException
at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:359)
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:291)
at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:447)
at org.eclipse.ui.internal.Workbench.runStartupWithProgress(Workbench.java:1258)
at org.eclipse.ui.internal.Workbench.restoreState(Workbench.java:1512)
at org.eclipse.ui.internal.Workbench.access$12(Workbench.java:1491)
at org.eclipse.ui.internal.Workbench$17.run(Workbench.java:1374)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1044)
at org.eclipse.core.runtime.Platform.run(Platform.java:783)
at org.eclipse.ui.internal.Workbench.restoreState(Workbench.java:1318)
at org.eclipse.ui.internal.WorkbenchConfigurer.restoreState(WorkbenchConfigurer.java:183)
at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:700)
at org.eclipse.ui.internal.Workbench.init(Workbench.java:1034)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1636)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:367)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143)
at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:103)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:226)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:163)
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(Main.java:334)
at org.eclipse.core.launcher.Main.basicRun(Main.java:278)
at org.eclipse.core.launcher.Main.run(Main.java:973)
at org.eclipse.core.launcher.Main.main(Main.java:948)
Caused by: java.lang.NoClassDefFoundError: org/eclipse/wst/common/uriresolver/internal/provisional/URIResolver
at com.ibm.rct.model.loader.RCTModelLoader.getAdapterFactories(RCTModelLoader.java:41)
at org.eclipse.wst.sse.core.internal.model.AbstractModelLoader.createModel(AbstractModelLoader.java:114)
at org.eclipse.wst.sse.core.internal.FileBufferModelManager.getModel(FileBufferModelManager.java:470)
at org.eclipse.wst.sse.core.internal.model.ModelManagerImpl._getModelFor(ModelManagerImpl.java:419)
at org.eclipse.wst.sse.core.internal.model.ModelManagerImpl.getModelForEdit(ModelManagerImpl.java:1076)
at org.eclipse.wst.sse.ui.internal.StructuredTextEditor.getModel(StructuredTextEditor.java:1556)
at com.ibm.rct.editor.RCTEditor.getRCTModel(RCTEditor.java:164)
at com.ibm.rct.laszlo.editor.preview.LaszloPreviewHandler.setSourceEditor(LaszloPreviewHandler.java:43)
at com.ibm.rct.editor.RCTMultiPageEditor.initPreviewHandler(RCTMultiPageEditor.java:270)
at com.ibm.rct.editor.RCTMultiPageEditor.createVisualEditor(RCTMultiPageEditor.java:281)
at com.ibm.rct.editor.RCTMultiPageEditor.createPages(RCTMultiPageEditor.java:153)
at org.eclipse.ui.part.MultiPageEditorPart.createPartControl(MultiPageEditorPart.java:241)
at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:585)
at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:365)
at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:552)
at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:283)
at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:126)
at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:268)
at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65)
at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:391)
at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1102)
at org.eclipse.ui.internal.PartStack.handleDeferredEvents(PartStack.java:1066)
at org.eclipse.ui.internal.LayoutPart.deferUpdates(LayoutPart.java:402)
at org.eclipse.ui.internal.PartSashContainer.handleDeferredEvents(PartSashContainer.java:1304)
at org.eclipse.ui.internal.LayoutPart.deferUpdates(LayoutPart.java:402)
at org.eclipse.ui.internal.WorkbenchPage.handleDeferredEvents(WorkbenchPage.java:1253)
at org.eclipse.ui.internal.WorkbenchPage.deferUpdates(WorkbenchPage.java:1243)
at org.eclipse.ui.internal.WorkbenchPage.restoreState(WorkbenchPage.java:2655)
at org.eclipse.ui.internal.WorkbenchWindow.restoreState(WorkbenchWindow.java:1819)
at org.eclipse.ui.internal.Workbench.doRestoreState(Workbench.java:2566)
at org.eclipse.ui.internal.Workbench.access$14(Workbench.java:2515)
at org.eclipse.ui.internal.Workbench$19.run(Workbench.java:1514)
at org.eclipse.ui.internal.Workbench$16.run(Workbench.java:1263)
at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:346)
... 27 more
Root exception:
java.lang.NoClassDefFoundError: org/eclipse/wst/common/uriresolver/internal/provisional/URIResolver
at com.ibm.rct.model.loader.RCTModelLoader.getAdapterFactories(RCTModelLoader.java:41)
at org.eclipse.wst.sse.core.internal.model.AbstractModelLoader.createModel(AbstractModelLoader.java:114)
at org.eclipse.wst.sse.core.internal.FileBufferModelManager.getModel(FileBufferModelManager.java:470)
at org.eclipse.wst.sse.core.internal.model.ModelManagerImpl._getModelFor(ModelManagerImpl.java:419)
at org.eclipse.wst.sse.core.internal.model.ModelManagerImpl.getModelForEdit(ModelManagerImpl.java:1076)
at org.eclipse.wst.sse.ui.internal.StructuredTextEditor.getModel(StructuredTextEditor.java:1556)
at com.ibm.rct.editor.RCTEditor.getRCTModel(RCTEditor.java:164)
at com.ibm.rct.laszlo.editor.preview.LaszloPreviewHandler.setSourceEditor(LaszloPreviewHandler.java:43)
at com.ibm.rct.editor.RCTMultiPageEditor.initPreviewHandler(RCTMultiPageEditor.java:270)
at com.ibm.rct.editor.RCTMultiPageEditor.createVisualEditor(RCTMultiPageEditor.java:281)
at com.ibm.rct.editor.RCTMultiPageEditor.createPages(RCTMultiPageEditor.java:153)
at org.eclipse.ui.part.MultiPageEditorPart.createPartControl(MultiPageEditorPart.java:241)
at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:585)
at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:365)
at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:552)
at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:283)
at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:126)
at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:268)
at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65)
at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:391)
at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1102)
at org.eclipse.ui.internal.PartStack.handleDeferredEvents(PartStack.java:1066)
at org.eclipse.ui.internal.LayoutPart.deferUpdates(LayoutPart.java:402)
at org.eclipse.ui.internal.PartSashContainer.handleDeferredEvents(PartSashContainer.java:1304)
at org.eclipse.ui.internal.LayoutPart.deferUpdates(LayoutPart.java:402)
at org.eclipse.ui.internal.WorkbenchPage.handleDeferredEvents(WorkbenchPage.java:1253)
at org.eclipse.ui.internal.WorkbenchPage.deferUpdates(WorkbenchPage.java:1243)
at org.eclipse.ui.internal.WorkbenchPage.restoreState(WorkbenchPage.java:2655)
at org.eclipse.ui.internal.WorkbenchWindow.restoreState(WorkbenchWindow.java:1819)
at org.eclipse.ui.internal.Workbench.doRestoreState(Workbench.java:2566)
at org.eclipse.ui.internal.Workbench.access$14(Workbench.java:2515)
at org.eclipse.ui.internal.Workbench$19.run(Workbench.java:1514)
at org.eclipse.ui.internal.Workbench$16.run(Workbench.java:1263)
at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:346)
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:291)
at org.eclipse.jface.dialogs.ProgressMonitorDialog.run(ProgressMonitorDialog.java:447)
at org.eclipse.ui.internal.Workbench.runStartupWithProgress(Workbench.java:1258)
at org.eclipse.ui.internal.Workbench.restoreState(Workbench.java:1512)
at org.eclipse.ui.internal.Workbench.access$12(Workbench.java:1491)
at org.eclipse.ui.internal.Workbench$17.run(Workbench.java:1374)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1044)
at org.eclipse.core.runtime.Platform.run(Platform.java:783)
at org.eclipse.ui.internal.Workbench.restoreState(Workbench.java:1318)
at org.eclipse.ui.internal.WorkbenchConfigurer.restoreState(WorkbenchConfigurer.java:183)
at org.eclipse.ui.application.WorkbenchAdvisor.openWindows(WorkbenchAdvisor.java:700)
at org.eclipse.ui.internal.Workbench.init(Workbench.java:1034)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1636)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:367)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143)
at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:103)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:226)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:163)
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(Main.java:334)
at org.eclipse.core.launcher.Main.basicRun(Main.java:278)
at org.eclipse.core.launcher.Main.run(Main.java:973)
at org.eclipse.core.launcher.Main.main(Main.java:948)

!ENTRY org.eclipse.jface 4 2 2005-08-18 12:37:48.875
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.jface".
!STACK 0
java.lang.NoClassDefFoundError: org/eclipse/wst/common/uriresolver/internal/provisional/URIResolver
at com.ibm.rct.model.loader.RCTModelLoader.getAdapterFactories(RCTModelLoader.java:41)
at org.eclipse.wst.sse.core.internal.model.AbstractModelLoader.createModel(AbstractModelLoader.java:114)
at org.eclipse.wst.sse.core.internal.FileBufferModelManager.getModel(FileBufferModelManager.java:470)
at org.eclipse.wst.sse.core.internal.model.ModelManagerImpl._getModelFor(ModelManagerImpl.java:419)
at org.eclipse.wst.sse.core.internal.model.ModelManagerImpl.getModelForEdit(ModelManagerImpl.java:1076)
at org.eclipse.wst.sse.ui.internal.StructuredTextEditor.getModel(StructuredTextEditor.java:1556)
at com.ibm.rct.editor.RCTEditor.getRCTModel(RCTEditor.java:164)
at com.ibm.rct.laszlo.editor.preview.LaszloPreviewHandler.setSourceEditor(LaszloPreviewHandler.java:43)
at com.ibm.rct.editor.RCTMultiPageEditor.initPreviewHandler(RCTMultiPageEditor.java:270)
at com.ibm.rct.editor.RCTMultiPageEditor.createVisualEditor(RCTMultiPageEditor.java:281)
at com.ibm.rct.editor.RCTMultiPageEditor.createPages(RCTMultiPageEditor.java:153)
at org.eclipse.ui.part.MultiPageEditorPart.createPartControl(MultiPageEditorPart.java:241)
at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:585)
at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:365)
at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:552)
at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:283)
at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:126)
at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:268)
at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65)
at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:391)
at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1102)
at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1051)
at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:1256)
at org.eclipse.ui.internal.PartStack.add(PartStack.java:442)
at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:109)
at org.eclipse.ui.internal.EditorSashContainer.addEditor(EditorSashContainer.java:60)
at org.eclipse.ui.internal.EditorAreaHelper.addToLayout(EditorAreaHelper.java:212)
at org.eclipse.ui.internal.EditorAreaHelper.addEditor(EditorAreaHelper.java:202)
at org.eclipse.ui.internal.EditorManager.createEditorTab(EditorManager.java:753)
at org.eclipse.ui.internal.EditorManager.openEditorFromDescriptor(EditorManager.java:665)
at org.eclipse.ui.internal.EditorManager.openEditor(EditorManager.java:628)
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2323)
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2258)
at org.eclipse.ui.internal.WorkbenchPage.access$9(WorkbenchPage.java:2250)
at org.eclipse.ui.internal.WorkbenchPage$9.run(WorkbenchPage.java:2236)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2231)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2212)
at org.eclipse.ui.ide.IDE.openEditor(IDE.java:371)
at org.eclipse.ui.ide.IDE.openEditor(IDE.java:334)
at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:251)
at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:131)
at org.eclipse.jdt.internal.ui.actions.OpenActionUtil.open(OpenActionUtil.java:49)
at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:169)
at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:153)
at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:222)
at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:198)
at org.eclipse.jdt.internal.ui.packageview.PackageExplorerActionGroup.handleOpen(PackageExplorerActionGroup.java:296)
at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$4.open(PackageExplorerPart.java:869)
at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:741)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1044)
at org.eclipse.core.runtime.Platform.run(Platform.java:783)
at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:44)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:148)
at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:739)
at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:968)
at org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:1067)
at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:243)
at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:238)
at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:277)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:843)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3080)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2713)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1699)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1663)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:367)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143)
at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:103)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:226)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:163)
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(Main.java:334)
at org.eclipse.core.launcher.Main.basicRun(Main.java:278)
at org.eclipse.core.launcher.Main.run(Main.java:973)
at org.eclipse.core.launcher.Main.main(Main.java:948)

I don't know laszlo ide, but it use older webtools, maybe - hibernate plugin install newer webtools and laszlo doesn't work - it mean that you can't use both

regards

Laszlo IDE needs webtools 0.7, which I installed together with Eclipse 3.1 using wtp-all-in-one-0.7-win32.zip. I also tried installing separately.

Which version does Hibernate plugin use?

If I change the order of installation and get Laszlo working, what sorts of problems are likely to occur?

Look at this :

https://bugs.eclipse.org/bugs/show_bug.cgi?id=105013

Hope it can help

alpha4 used the WTP M5.

current cvs uses 0.7

/max