RS in folder component

2013-10-27 18:03:05,985 [ajp-apr-8014-exec-24] ERROR OLATRuntimeException - OLAT::ERROR ^%^ N14-E6 
Mozilla/5.0 (Windows NT 5.1; rv:13.0) Gecko/20100101 Firefox/13.0
**RedScreen**
<dispatchinfo>
	<componentinfo>
		<compname>link_0</compname>
		<compclass>org.olat.core.gui.components.link.Link</compclass>
		<extendedinfo>n/a</extendedinfo>
		<event>
			<class&gt;org.olat.core.gui.control.Event</class&gt;
			<command>link_0</command>
			<tostring>com:link_0,org.olat.core.gui.control.Event@be46a54a</tostring>
		</event>
	</componentinfo>
	<controllerinfo>
		<controllername>org.olat.core.gui.control.generic.modal.DialogBoxController</controllername>
		<controllername>org.olat.core.commons.modules.bc.commands.CmdDelete</controllername>
		<controllername>org.olat.core.commons.modules.bc.FolderRunController</controllername>
		<controllername>org.olat.group.ui.run.BusinessGroupMainRunController</controllername>
		<controllername>org.olat.core.commons.fullWebApp.BaseFullWebappController</controllername>
		<controllername>org.olat.core.commons.chiefcontrollers.controller.simple.SimpleBaseController</controllername>
		<controllername>org.olat.core.commons.chiefcontrollers.BaseChiefController</controllername>
	</controllerinfo>
</dispatchinfo>
>>> stack of 1.cause::org.olat.core.logging.OLATRuntimeException: null
-> at org.olat.core.gui.exception.ExceptionWindowController.<init>(ExceptionWindowController.java:107)
   at org.olat.core.gui.exception.MsgFactory.createMessageChiefController(MsgFactory.java:57)
   at org.olat.core.gui.exception.MsgFactory.createMessageChiefController(MsgFactory.java:46)
   at org.olat.core.gui.components.Window.dispatchRequest(Window.java:508)
   at org.olat.core.gui.components.Window.doDispatchRequest(Window.java:226)
   at org.olat.core.gui.components.Component.dispatchRequest(Component.java:192)
   at org.olat.dispatcher.AuthenticatedDispatcher.execute(AuthenticatedDispatcher.java:227)
   at org.olat.core.dispatcher.DispatcherAction.execute(DispatcherAction.java:154)
   at org.olat.core.servlets.OLATServlet.doPost(OLATServlet.java:155)
   at org.olat.core.servlets.OLATServlet.doGet(OLATServlet.java:128)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
>>> stack of 2.cause::java.lang.NullPointerException: null
-> at org.olat.core.commons.modules.bc.FolderRunController.event(FolderRunController.java:278)
   at org.olat.core.gui.control.DefaultController$1.run(DefaultController.java:239)
   at org.olat.core.logging.activity.ThreadLocalUserActivityLoggerInstaller.runWithUserActivityLogger(ThreadLocalUserActivityLoggerInstaller.java:108)
   at org.olat.core.gui.control.DefaultController.dispatchEvent(DefaultController.java:236)
   at org.olat.core.gui.control.DefaultController.fireEvent(DefaultController.java:184)
   at org.olat.core.commons.modules.bc.commands.CmdDelete.event(CmdDelete.java:121)
   at org.olat.core.gui.control.DefaultController$1.run(DefaultController.java:239)
   at org.olat.core.logging.activity.ThreadLocalUserActivityLoggerInstaller.runWithUserActivityLogger(ThreadLocalUserActivityLoggerInstaller.java:108)
   at org.olat.core.gui.control.DefaultController.dispatchEvent(DefaultController.java:236)
   at org.olat.core.gui.control.DefaultController.fireEvent(DefaultController.java:184)
   at org.olat.core.gui.control.generic.modal.DialogBoxController.event(DialogBoxController.java:205)