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java.lang.NoClassDefFoundError: net/sourceforge/eclipseccase/ClearcaseModificationHandler	at java.lang.Class.getDeclaredConstructors0(Native Method)	at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)	at java.lang.Class.getConstructor0(Unknown Source)	at java.lang.Class.newInstance0(Unknown Source)	at java.lang.Class.newInstance(Unknown Source)	at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadBundleActivator(AbstractBundle.java:153)	at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:933)	at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:421)	at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:293)	at org.eclipse.core.runtime.adaptor.EclipseClassLoader.findLocalClass(EclipseClassLoader.java:110)	at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass(BundleLoader.java:371)	at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:402)	at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.loadClass(AbstractClassLoader.java:93)	at java.lang.ClassLoader.loadClass(Unknown Source)	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:51)	at org.eclipse.ui.internal.WorkbenchPlugin.createExtension(WorkbenchPlugin.java:193)	at org.eclipse.ui.internal.decorators.LightweightDecoratorDefinition$1.run(LightweightDecoratorDefinition.java:83)	at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:616)	at org.eclipse.core.runtime.Platform.run(Platform.java:747)	at org.eclipse.ui.internal.decorators.LightweightDecoratorDefinition.internalGetDecorator(LightweightDecoratorDefinition.java:79)	at org.eclipse.ui.internal.decorators.LightweightDecoratorDefinition.decorate(LightweightDecoratorDefinition.java:153)	at org.eclipse.ui.internal.decorators.LightweightDecoratorManager$LightweightRunnable.run(LightweightDecoratorManager.java:60)	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.decorators.LightweightDecoratorManager.decorate(LightweightDecoratorManager.java:258)	at org.eclipse.ui.internal.decorators.LightweightDecoratorManager.getDecorations(LightweightDecoratorManager.java:241)	at org.eclipse.ui.internal.decorators.DecorationScheduler$1.run(DecorationScheduler.java:285)	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:66)