[monocongo]

I have lost the ability to edit XML files with MyEclipse. The error message I receive when I double click on one of my *.xml files says this:

Problems Opening Editor
Cannot open default editor on jboss-web.xml. Unable to instantiate editor: org.xmen.ui.text.XMLTextEditor
org.eclipse.core.runtime.CoreException: Plug-in com.ibm.xmleditor was unable to load class com.ibm.xmleditor.internal.XMLMultiPageEditorPart

Can anyone suggest a solution ? What could have caused this ? I can still edit my Java codes so I am hesitant to restart MyEclipse since I am working against a tight deadline and I was recently burned by having MyEclipse disappear on me after a restart, requiring me to reinstall both Eclipse and MyEclipse.

I am running Eclipse 3.0.1 and MyEclipse 3.8.2 on Windows XP.

Thanks in advance for any suggestions.

–James

[Riyad Kalla]

James,
Can you open your Eclipse log file (workspace dir)\.metadata\.log and see if there are any exceptions related to this? I’d like to know explicitly what the editor is getting mad about.

[monocongo]

Here’s the exception stack trace from the .log file:

!SUBENTRY 1 org.eclipse.core.runtime 4 1 Oct 14, 2004 10:16:13.975
!MESSAGE Plug-in com.ibm.xmleditor was unable to load class com.ibm.xmleditor.internal.XMLMultiPageEditorPart.
!STACK 0
java.lang.ClassNotFoundException: com.ibm.xmleditor.internal.XMLMultiPageEditorPart
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:404)
at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.loadClass(AbstractClassLoader.java:93)
at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass(BundleLoader.java:307)
at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:336)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1313)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:131)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:124)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:113)
at org.eclipse.ui.internal.WorkbenchPlugin$1.run(WorkbenchPlugin.java:196)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69)
at org.eclipse.ui.internal.WorkbenchPlugin.createExtension(WorkbenchPlugin.java:193)
at org.eclipse.ui.internal.EditorManager$5.run(EditorManager.java:787)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:616)
at org.eclipse.core.runtime.Platform.run(Platform.java:747)
at org.eclipse.ui.internal.EditorManager.createPart(EditorManager.java:785)
at org.eclipse.ui.internal.EditorManager.openInternalEditor(EditorManager.java:772)
at org.eclipse.ui.internal.EditorManager.openEditorFromDescriptor(EditorManager.java:582)
at org.eclipse.ui.internal.EditorManager.openEditor(EditorManager.java:570)
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2244)
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2177)
at org.eclipse.ui.internal.WorkbenchPage.access$6(WorkbenchPage.java:2169)
at org.eclipse.ui.internal.WorkbenchPage$9.run(WorkbenchPage.java:2156)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2151)
at org.eclipse.ui.ide.IDE.openEditor(IDE.java:299)
at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:137)
at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:110)
at org.eclipse.jdt.internal.ui.actions.OpenActionUtil.open(OpenActionUtil.java:49)
at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:164)
at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:150)
at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:212)
at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:188)
at org.eclipse.jdt.internal.ui.packageview.PackageExplorerActionGroup.handleOpen(PackageExplorerActionGroup.java:289)
at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$4.open(PackageExplorerPart.java:490)
at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:429)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:616)
at org.eclipse.core.runtime.Platform.run(Platform.java:747)
at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:427)
at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:635)
at org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:731)
at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:211)
at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:206)
at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:238)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:796)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2772)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2431)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1377)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1348)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:254)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:141)
at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:96)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:335)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:273)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:129)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.eclipse.core.launcher.Main.basicRun(Main.java:185)
at org.eclipse.core.launcher.Main.run(Main.java:704)
at org.eclipse.core.launcher.Main.main(Main.java:688)

[Riyad Kalla]

Strange, did your MyEclipse install get corrupt? Do you have a directory at <myeclipse install dir>\eclipse\plugins\com.ibm.xmleditor_13.8.2, does it contain an xmleditor.jar file?

[monocongo]

Yes I do have that directory, but it doesn’t contain the JAR file. Does this mean I’ve lost the JAR file, or was it perhaps never there to begin with ?

I was editing XML files before this happened, so if this JAR is needed for the XML editor then it must have been lost somehow.

–James

[Riyad Kalla]

Wow, I’m not sure how it got lost, but yes this would certainly qualify as being a “corrupt install”. It could be any number of things, but the best thing I can suggest is to grab the Manual Install or rerun the automatic install and have it reinstall MyEclipse to the existing location (make sure you are using the 3.8.2 install if that is the version you aer currently using).

Then shut down Eclipse, add the -clean option to the command line, and start it back up (and you can remove -clean if you want). You should be good to go.

[monocongo]

This fixed me right up, thanks for the help.

–James

[Riyad Kalla]

Glad to hear it.

[penga]

pls allow me to append my msg here, coz i got something similar

[error msg]
unable to instantiate editor:
com.objfac.xmleditor.XMLEditor java.lang.NoClassDefFoundError
org/eclipse/ui/texteditor/ExtendedTextEditor

I am running Eclipse 3.0M8 and MyEclipse 3.8.2 on Windows XP
I have re-installed eclipse(C:\eclipse) & myeclipse(C:\Program Files\MyEclipse), but still got the same error.
I have this dir C:\eclipse\plugins\com.objfac.xmleditor_2.0.2 with xmleditor.jar file on my PC
I also have C:\eclipse\plugins\org.eclipse.ui.editors_3.0.0 with editors.jar, but this jar doesn’t contain org/eclipse/ui/texteditor/ExtendedTextEditor class file.

Pls give some suggestions to fix the problem.

-penga

[log file attached]
!SESSION Nov 05, 2004 12:02:58.62 ———————————————-
eclipse.buildId=I200406251208
java.version=1.4.2_04
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=en_US

!ENTRY org.eclipse.core.runtime 4 2 Nov 05, 2004 12:02:58.62
!MESSAGE Problems occurred when invoking code from plug-in: “org.eclipse.core.runtime”.
!STACK 0
java.lang.NoClassDefFoundError: org/eclipse/ui/texteditor/ExtendedTextEditor
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:1610)
at java.lang.Class.getConstructor0(Class.java:1922)
at java.lang.Class.newInstance0(Class.java:278)
at java.lang.Class.newInstance(Class.java:261)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:141)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:124)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:113)
at org.eclipse.ui.internal.WorkbenchPlugin.createExtension(WorkbenchPlugin.java:189)
at org.eclipse.ui.internal.EditorManager$5.run(EditorManager.java:790)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:615)
at org.eclipse.core.runtime.Platform.run(Platform.java:747)
at org.eclipse.ui.internal.EditorManager.createPart(EditorManager.java:788)
at org.eclipse.ui.internal.EditorManager.openInternalEditor(EditorManager.java:775)
at org.eclipse.ui.internal.EditorManager.openEditorFromDescriptor(EditorManager.java:585)
at org.eclipse.ui.internal.EditorManager.openEditor(EditorManager.java:573)
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2201)
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2134)
at org.eclipse.ui.internal.WorkbenchPage.access$6(WorkbenchPage.java:2126)
at org.eclipse.ui.internal.WorkbenchPage$9.run(WorkbenchPage.java:2113)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2108)
at org.eclipse.ui.ide.IDE.openEditor(IDE.java:299)
at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:137)
at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:110)
at org.eclipse.jdt.internal.ui.actions.OpenActionUtil.open(OpenActionUtil.java:49)
at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:164)
at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:150)
at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:212)
at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:188)
at org.eclipse.jdt.internal.ui.packageview.PackageExplorerActionGroup.handleOpen(PackageExplorerActionGroup.java:289)
at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$4.open(PackageExplorerPart.java:490)
at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:429)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:615)
at org.eclipse.core.runtime.Platform.run(Platform.java:747)
at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:427)
at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:635)
at org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:731)
at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:211)
at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:206)
at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:238)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:796)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2772)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2431)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1377)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1348)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:254)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:141)
at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:96)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:335)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:273)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:129)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.eclipse.core.launcher.Main.basicRun(Main.java:183)
at org.eclipse.core.launcher.Main.run(Main.java:644)
at org.eclipse.core.launcher.Main.main(Main.java:628)

[penga]

ok, folks,
I removed the eclipse and myeclipse folders and did a fresh installation, it is working now!

[Riyad Kalla]

Glad to hear it, sometimes the configs can get a little mixed up and it really manifests itself strangely.

[Author]

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