java.lang.ClassNotFoundException: org.netbeans.core.actions.ViewRuntimeTabAction
        at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
        at java.security.AccessController.doPrivileged(AccessController.java:0)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
Caused: java.lang.ClassNotFoundException: org.netbeans.core.actions.ViewRuntimeTabAction starting from SystemClassLoader[448 modules] with possible defining loaders [ModuleCL@487fb7[org.netbeans.core]] and declared parents [ModuleCL@1ff8de3[org.netbeans.modules.ant.kit], ModuleCL@a16605[org.netbeans.modules.websvc.wsstack.jaxws], ModuleCL@5bdfae[org.netbeans.modules.apisupport.refactoring], ModuleCL@2b7bd9[org.netbeans.modules.websvc.jaxwsmodel], ModuleCL@1cb2dd1[org.netbeans.modules.websvc.jaxrpc16], ModuleCL@1f13b08[org.netbeans.modules.db.kit], ModuleCL@73cc11[org.netbeans.libs.freemarker], ModuleCL@166ce5f[org.netbeans.modules.xml.jaxb], ModuleCL@30e4a7[org.netbeans.modules.welcome], ModuleCL@1af7a03[org.netbeans.modules.sendopts], ...433 more]
        at org.netbeans.ProxyClassLoader.loadClass(ProxyClassLoader.java:259)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
        at org.openide.loaders.InstanceSupport.findClass(InstanceSupport.java:497)
        at org.openide.loaders.InstanceSupport.instanceClass(InstanceSupport.java:145)
        at org.openide.loaders.InstanceDataObject$Ser.instanceClass(InstanceDataObject.java:1228)
        at org.openide.loaders.InstanceDataObject.instanceClass(InstanceDataObject.java:738)
        at org.openide.awt.MenuBar$LazyMenu$MenuFolder.acceptCookie(MenuBar.java:641)
        at org.openide.loaders.FolderInstance.acceptDataObject(FolderInstance.java:420)
        at org.openide.loaders.FolderInstance.defaultProcessObjects(FolderInstance.java:767)
        at org.openide.loaders.FolderInstance.access$000(FolderInstance.java:101)
        at org.openide.loaders.FolderInstance$1R.init(FolderInstance.java:685)
        at org.openide.loaders.FolderInstance$1R.run(FolderInstance.java:712)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:577)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1030)