Eclipse won’t start but no error is shown

Any idea why my Eclipse isn't starting?

The eclipse.ini has the following:

-startup plugins/org.eclipse.equinox.launcher_1.1.0.v20100507.jar
--launcher.library plugins/org.eclipse.equinox.launcher.win32.win32.x86_64_1.1.0.v20100503
-product org.eclipse.epp.package.jee.product
--launcher.defaultAction openFile
--launcher.XXMaxPermSize 256M
-showsplash org.eclipse.platform
--launcher.XXMaxPermSize 256m
--launcher.defaultAction openFile
-vmargs
-Dosgi.requiredJavaVersion=1.5
-Xms40m
-Xmx512m

The error log in workspace log file shows this

!ENTRY org.eclipse.core.resources 2 10035 2011-10-21 12:03:18.134
!MESSAGE The workspace exited with unsaved changes in the previous
session; refreshing workspace to recover changes.

!ENTRY org.eclipse.osgi 4 0 2011-10-21 12:03:19.447 !MESSAGE An error
occurred while automatically activating bundle
org.eclipse.core.resources (68). !STACK 0
org.osgi.framework.BundleException: Exception in
org.eclipse.core.resources.ResourcesPlugin.start() of bundle
org.eclipse.core.resources. at
org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:806)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:755)
at
org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:370)
at
org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:284)
at
org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:417)
at
org.eclipse.osgi.internal.loader.BundleLoader.setLazyTrigger(BundleLoader.java:265)
at
org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:106)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:453)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:216)
at
org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:393)
at
org.eclipse.osgi.internal.loader.SingleSourcePackage.loadClass(SingleSourcePackage.java:33)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:466)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:422)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:410)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
at java.lang.ClassLoader.loadClass(Unknown Source) at
org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:116)
at
org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
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:369)
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:619) at
org.eclipse.equinox.launcher.Main.basicRun(Main.java:574) at
org.eclipse.equinox.launcher.Main.run(Main.java:1407) at
org.eclipse.equinox.launcher.Main.main(Main.java:1383) Caused by:
org.eclipse.core.internal.dtree.ObjectNotFoundException: Tree element
'/webtop/.classpath' not found. at
org.eclipse.core.internal.dtree.AbstractDataTree.handleNotFound(AbstractDataTree.java:257)
at
org.eclipse.core.internal.dtree.DeltaDataTree.getData(DeltaDataTree.java:585)
at
org.eclipse.core.internal.dtree.DataDeltaNode.asBackwardDelta(DataDeltaNode.java:50)
at
org.eclipse.core.internal.dtree.DataDeltaNode.asBackwardDelta(DataDeltaNode.java:47)
at
org.eclipse.core.internal.dtree.DataDeltaNode.asBackwardDelta(DataDeltaNode.java:47)
at
org.eclipse.core.internal.dtree.DeltaDataTree.asBackwardDelta(DeltaDataTree.java:88)
at
org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:816)
at
org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:815)
at
org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:815)
at
org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:792)
at
org.eclipse.core.internal.watson.ElementTree.immutable(ElementTree.java:517)
at
org.eclipse.core.internal.resources.SaveManager.restore(SaveManager.java:688)
at
org.eclipse.core.internal.resources.SaveManager.startup(SaveManager.java:1503)
at
org.eclipse.core.internal.resources.Workspace.startup(Workspace.java:2134)
at
org.eclipse.core.internal.resources.Workspace.open(Workspace.java:1883)
at
org.eclipse.core.resources.ResourcesPlugin.start(ResourcesPlugin.java:406)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:783)
at java.security.AccessController.doPrivileged(Native Method) at
org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:774)
… 29 more Root exception:
org.eclipse.core.internal.dtree.ObjectNotFoundException: Tree element
'/webtop/.classpath' not found. at
org.eclipse.core.internal.dtree.AbstractDataTree.handleNotFound(AbstractDataTree.java:257)
at
org.eclipse.core.internal.dtree.DeltaDataTree.getData(DeltaDataTree.java:585)
at
org.eclipse.core.internal.dtree.DataDeltaNode.asBackwardDelta(DataDeltaNode.java:50)
at
org.eclipse.core.internal.dtree.DataDeltaNode.asBackwardDelta(DataDeltaNode.java:47)
at
org.eclipse.core.internal.dtree.DataDeltaNode.asBackwardDelta(DataDeltaNode.java:47)
at
org.eclipse.core.internal.dtree.DeltaDataTree.asBackwardDelta(DeltaDataTree.java:88)
at
org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:816)
at
org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:815)
at
org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:815)
at
org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:792)
at
org.eclipse.core.internal.watson.ElementTree.immutable(ElementTree.java:517)
at
org.eclipse.core.internal.resources.SaveManager.restore(SaveManager.java:688)
at
org.eclipse.core.internal.resources.SaveManager.startup(SaveManager.java:1503)
at
org.eclipse.core.internal.resources.Workspace.startup(Workspace.java:2134)
at
org.eclipse.core.internal.resources.Workspace.open(Workspace.java:1883)
at
org.eclipse.core.resources.ResourcesPlugin.start(ResourcesPlugin.java:406)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:783)
at java.security.AccessController.doPrivileged(Native Method) at
org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:774)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:755)
at
org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:370)
at
org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:284)
at
org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:417)
at
org.eclipse.osgi.internal.loader.BundleLoader.setLazyTrigger(BundleLoader.java:265)
at
org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:106)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:453)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:216)
at
org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:393)
at
org.eclipse.osgi.internal.loader.SingleSourcePackage.loadClass(SingleSourcePackage.java:33)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:466)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:422)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:410)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
at java.lang.ClassLoader.loadClass(Unknown Source) at
org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:116)
at
org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
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:369)
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:619) at
org.eclipse.equinox.launcher.Main.basicRun(Main.java:574) at
org.eclipse.equinox.launcher.Main.run(Main.java:1407) at
org.eclipse.equinox.launcher.Main.main(Main.java:1383)

!ENTRY org.eclipse.osgi 4 0 2011-10-21 12:03:19.467 !MESSAGE
Application error !STACK 1 java.lang.NoClassDefFoundError:
org/eclipse/core/resources/IContainer at
org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:116)
at
org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
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:369)
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:619) at
org.eclipse.equinox.launcher.Main.basicRun(Main.java:574) at
org.eclipse.equinox.launcher.Main.run(Main.java:1407) at
org.eclipse.equinox.launcher.Main.main(Main.java:1383) Caused by:
org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter$TerminatingClassNotFoundException:
An error occurred while automatically activating bundle
org.eclipse.core.resources (68). at
org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:121)
at
org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:453)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:216)
at
org.eclipse.osgi.internal.loader.BundleLoader.findLocalClass(BundleLoader.java:393)
at
org.eclipse.osgi.internal.loader.SingleSourcePackage.loadClass(SingleSourcePackage.java:33)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:466)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:422)
at
org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:410)
at
org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:107)
at java.lang.ClassLoader.loadClass(Unknown Source) … 14 more
Caused by: org.osgi.framework.BundleException: Exception in
org.eclipse.core.resources.ResourcesPlugin.start() of bundle
org.eclipse.core.resources. at
org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:806)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:755)
at
org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:370)
at
org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:284)
at
org.eclipse.osgi.framework.util.SecureAction.start(SecureAction.java:417)
at
org.eclipse.osgi.internal.loader.BundleLoader.setLazyTrigger(BundleLoader.java:265)
at
org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.postFindLocalClass(EclipseLazyStarter.java:106)
… 23 more Caused by:
org.eclipse.core.internal.dtree.ObjectNotFoundException: Tree element
'/webtop/.classpath' not found. at
org.eclipse.core.internal.dtree.AbstractDataTree.handleNotFound(AbstractDataTree.java:257)
at
org.eclipse.core.internal.dtree.DeltaDataTree.getData(DeltaDataTree.java:585)
at
org.eclipse.core.internal.dtree.DataDeltaNode.asBackwardDelta(DataDeltaNode.java:50)
at
org.eclipse.core.internal.dtree.DataDeltaNode.asBackwardDelta(DataDeltaNode.java:47)
at
org.eclipse.core.internal.dtree.DataDeltaNode.asBackwardDelta(DataDeltaNode.java:47)
at
org.eclipse.core.internal.dtree.DeltaDataTree.asBackwardDelta(DeltaDataTree.java:88)
at
org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:816)
at
org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:815)
at
org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:815)
at
org.eclipse.core.internal.dtree.DeltaDataTree.reroot(DeltaDataTree.java:792)
at
org.eclipse.core.internal.watson.ElementTree.immutable(ElementTree.java:517)
at
org.eclipse.core.internal.resources.SaveManager.restore(SaveManager.java:688)
at
org.eclipse.core.internal.resources.SaveManager.startup(SaveManager.java:1503)
at
org.eclipse.core.internal.resources.Workspace.startup(Workspace.java:2134)
at
org.eclipse.core.internal.resources.Workspace.open(Workspace.java:1883)
at
org.eclipse.core.resources.ResourcesPlugin.start(ResourcesPlugin.java:406)
at
org.eclipse.osgi.framework.internal.core.BundleContextImpl$1.run(BundleContextImpl.java:783)
at java.security.AccessController.doPrivileged(Native Method) at
org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:774)
… 29 more