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java.lang.NullPointerException: 	at java.lang.String.indexOf(Unknown Source)	at java.lang.String.indexOf(Unknown Source)	at net.sf.eclipsecs.ui.duplicates.DuplicatedCode.getNumberOfDuplicatedLines(DuplicatedCode.java:127)	at net.sf.eclipsecs.ui.duplicates.DuplicatedCodeView$4.run(DuplicatedCodeView.java:358)	at net.sf.eclipsecs.ui.duplicates.DuplicatedCodeView$6.doubleClick(DuplicatedCodeView.java:462)	at org.eclipse.jface.viewers.StructuredViewer$1.run(StructuredViewer.java:845)	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)	at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)	at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)	at org.eclipse.jface.viewers.StructuredViewer.fireDoubleClick(StructuredViewer.java:843)	at org.eclipse.jface.viewers.AbstractTreeViewer.handleDoubleSelect(AbstractTreeViewer.java:1462)	at org.eclipse.jface.viewers.StructuredViewer$4.widgetDefaultSelected(StructuredViewer.java:1246)	at org.eclipse.jface.util.OpenStrategy.fireDefaultSelectionEvent(OpenStrategy.java:249)	at org.eclipse.jface.util.OpenStrategy.access$0(OpenStrategy.java:246)	at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:307)	at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)	at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)	at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4165)	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3754)	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2696)	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2660)	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2494)	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:674)	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:667)	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:123)	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:344)	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:622)	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:577)	at org.eclipse.equinox.launcher.Main.run(Main.java:1410)