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[339 modules] with possible defining loaders [ModuleCL@ab1b4[org.netbeans.core]] and declared parents [ModuleCL@1555185[org.netbeans.modules.websvc.saas.services.amazon], ModuleCL@834cfb[org.netbeans.modules.xml.catalog], ModuleCL@162d950[org.netbeans.modules.editor.bookmarks], ModuleCL@f81402[org.netbeans.modules.tasklist.ui], ModuleCL@1cdfd19[org.netbeans.modules.xml.tools.java], ModuleCL@80ed90[org.netbeans.modules.websvc.jaxws21api], ModuleCL@174cb21[org.netbeans.libs.cglib], ModuleCL@257b34[org.netbeans.libs.swingx], ModuleCL@1c7d56b[org.netbeans.modules.versioning.util], ModuleCL@229ed4[org.netbeans.modules.uihandler.exceptionreporter], ...324 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:637)
        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:573)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1005)