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java.lang.ExceptionInInitializerError at org.netbeans.modules.tasklist.usertasks.translators.ICalImportFormat.read(ICalImportFormat.java:128) at org.netbeans.modules.tasklist.usertasks.model.UserTaskList.readDocument(UserTaskList.java:339) at org.netbeans.modules.tasklist.usertasks.model.UserTaskList.readDocument(UserTaskList.java:375) at org.netbeans.modules.tasklist.usertasks.model.UserTaskList.getDefault(UserTaskList.java:163) at org.netbeans.modules.tasklist.usertasks.UserTaskView.readExternal(UserTaskView.java:305) at org.openide.windows.TopComponent$Replacer.readObject(TopComponent.java:1328) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:919) at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1813) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1713) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1299) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:339) at org.netbeans.modules.settings.convertors.XMLSettingsSupport$SettingsRecognizer.readSerial(XMLSettingsSupport.java:520) at org.netbeans.modules.settings.convertors.XMLSettingsSupport$SettingsRecognizer.instanceCreate(XMLSettingsSupport.java:548) at org.netbeans.modules.settings.convertors.SerialDataConvertor$SettingsInstance.instanceCreate(SerialDataConvertor.java:371) at org.netbeans.core.windows.persistence.PersistenceManager.getTopComponentPersistentForID(PersistenceManager.java:445) at org.netbeans.core.windows.persistence.PersistenceManager.getTopComponentForID(PersistenceManager.java:552) at org.netbeans.core.windows.PersistenceHandler.getTopComponentForID(PersistenceHandler.java:354) at org.netbeans.core.windows.PersistenceHandler.load(PersistenceHandler.java:99) at org.netbeans.core.windows.WindowSystemImpl.load(WindowSystemImpl.java:45)[catch] at org.netbeans.core.NonGui$3.run(NonGui.java:224) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209) at java.awt.EventQueue.dispatchEvent(EventQueue.java:461) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149) at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)Caused by: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException:org.apache.commons.logging.LogConfigurationException: Invalid class loaderhierarchy. You have more than one version of 'org.apache.commons.logging.Log'visible, which is not allowed. (Caused byorg.apache.commons.logging.LogConfigurationException: Invalid class loaderhierarchy. You have more than one version of 'org.apache.commons.logging.Log'visible, which is not allowed.) (Caused byorg.apache.commons.logging.LogConfigurationException:org.apache.commons.logging.LogConfigurationException: Invalid class loaderhierarchy. You have more than one version of 'org.apache.commons.logging.Log'visible, which is not allowed. (Caused byorg.apache.commons.logging.LogConfigurationException: Invalid class loaderhierarchy. You have more than one version of 'org.apache.commons.logging.Log'visible, which is not allowed.)) at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:543) at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:235) at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:209) at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:351) at net.fortuna.ical4j.data.CalendarBuilder.<clinit>(Unknown Source) ... 31 moreCaused by: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: Invalid class loaderhierarchy. You have more than one version of 'org.apache.commons.logging.Log'visible, which is not allowed. (Caused byorg.apache.commons.logging.LogConfigurationException: Invalid class loaderhierarchy. You have more than one version of 'org.apache.commons.logging.Log'visible, which is not allowed.) at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:397) at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:529) ... 35 moreCaused by: org.apache.commons.logging.LogConfigurationException: Invalid classloader hierarchy. You have more than one version of'org.apache.commons.logging.Log' visible, which is not allowed. at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:385) ... 36 more