NoClassDefFound on Idea9

com/intellij/util/ui/treetable/ListTreeTableModelOnColumns: com/intellij/util/ui/treetable/ListTreeTableModelOnColumns
java.lang.NoClassDefFoundError: com/intellij/util/ui/treetable/ListTreeTableModelOnColumns
at com.cenqua.clover.idea.CloverToolWindow.getCoveragePane(CloverToolWindow.java:180)
at com.cenqua.clover.idea.CloverToolWindow.initComponents(CloverToolWindow.java:111)
at com.cenqua.clover.idea.CloverToolWindow.<init>(CloverToolWindow.java:67)
at com.cenqua.clover.idea.CloverToolWindow.getInstance(CloverToolWindow.java:57)
at com.cenqua.clover.idea.ProjectPlugin.projectPostStartup(ProjectPlugin.java:116)
at com.cenqua.clover.idea.ProjectPlugin.access$000(ProjectPlugin.java:45)
at com.cenqua.clover.idea.ProjectPlugin$1.run(ProjectPlugin.java:71)
at com.intellij.ide.startup.impl.StartupManagerImpl.a(StartupManagerImpl.java:44)
at com.intellij.ide.startup.impl.StartupManagerImpl.runPostStartupActivities(StartupManagerImpl.java:74)
at com.intellij.openapi.project.impl.ProjectManagerImpl.openProject(ProjectManagerImpl.java:268)
at com.intellij.openapi.project.impl.ProjectManagerImpl.loadAndOpenProject(ProjectManagerImpl.java:177)
at com.intellij.openapi.project.impl.ProjectManagerImpl.loadAndOpenProject(ProjectManagerImpl.java:299)
at com.intellij.ide.impl.ProjectUtil.openProject(ProjectUtil.java:49)
at com.intellij.ide.impl.ProjectUtil.openOrImport(ProjectUtil.java:108)
at com.intellij.ide.actions.OpenProjectAction.actionPerformed(OpenProjectAction.java:15)
at com.intellij.openapi.wm.impl.welcomeScreen.WelcomeScreen$ActionGroupDescriptor$3.onPress(WelcomeScreen.java:6)
at com.intellij.openapi.wm.impl.welcomeScreen.WelcomeScreen$ButtonWithExtension.onPress(WelcomeScreen.java:4)
at com.intellij.openapi.wm.impl.welcomeScreen.WelcomeScreen$ActionGroupDescriptor$2.mouseClicked(WelcomeScreen.java:2)
at java.awt.Component.processMouseEvent(Component.java:6219)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
at java.awt.Component.processEvent(Component.java:5981)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4583)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4413)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4556)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4229)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4150)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2475)
at java.awt.Component.dispatchEvent(Component.java:4413)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at com.intellij.ide.IdeEventQueue.c(IdeEventQueue.java:239)
at com.intellij.ide.IdeEventQueue.b(IdeEventQueue.java:63)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:233)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
Caused by: java.lang.ClassNotFoundException: com.intellij.util.ui.treetable.ListTreeTableModelOnColumns
at com.intellij.ide.plugins.cl.PluginClassLoader.loadClass(PluginClassLoader.java:54)
at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
... 41 more