RS sorting the artifact list

2015-10-08 22:07:31,104 [ajp-nio2-8004-exec-35] ERROR OLATRuntimeException - OLAT::ERROR ^%^ N4-E2549 

Mozilla/5.0 (Windows NT 6.3; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0 ^%^ **RedScreen** Index: 2, Size: 2

<dispatchinfo>
	<componentinfo>
		<compname>table</compname>
		<compclass>org.olat.core.gui.components.table.Table</compclass>
		<extendedinfo>n/a</extendedinfo>
		<event>	</event>
	</componentinfo>
	<controllerinfo>
		<controllername>org.olat.core.gui.components.table.TableController</controllername>
		<controllername>org.olat.portfolio.ui.artefacts.view.EPMultipleArtefactsAsTableController</controllername>
		<controllername>org.olat.portfolio.ui.EPArtefactPoolRunController</controllername>
		<controllername>org.olat.portfolio.ui.EPOverviewController</controllername>
		<controllername>org.olat.home.HomeMainController</controllername>
		<controllername>org.olat.core.commons.fullWebApp.BaseFullWebappController</controllername>
	</controllerinfo>
</dispatchinfo>

>>> stack of 1.cause::org.olat.core.logging.OLATRuntimeException: Index: 2, Size: 2
-> at org.olat.core.gui.exception.ExceptionWindowController.<init>(ExceptionWindowController.java:116)
   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:536)
   at org.olat.core.gui.components.Window.doDispatchRequest(Window.java:234)
   at org.olat.core.gui.components.AbstractComponent.dispatchRequest(AbstractComponent.java:193)
   at org.olat.dispatcher.AuthenticatedDispatcher.processValidDispatchURI(AuthenticatedDispatcher.java:245)
   at org.olat.dispatcher.AuthenticatedDispatcher.execute(AuthenticatedDispatcher.java:201)
   at org.olat.core.servlets.OpenOLATServlet.executeUserRequest(OpenOLATServlet.java:280)
   at org.olat.core.servlets.OpenOLATServlet.doPost(OpenOLATServlet.java:223)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
>>> stack of 2.cause::java.lang.IndexOutOfBoundsException: Index: 2, Size: 2
-> at java.util.ArrayList.rangeCheck(ArrayList.java:653)
   at java.util.ArrayList.get(ArrayList.java:429)
   at org.olat.core.gui.components.table.Table.getColumnDescriptor(Table.java:173)
   at org.olat.core.gui.components.table.Table.resort(Table.java:527)
   at org.olat.core.gui.components.table.Table.dispatchRequest(Table.java:381)
   at org.olat.core.gui.components.table.Table.doDispatchRequest(Table.java:360)
   at org.olat.core.gui.components.AbstractComponent.dispatchRequest(AbstractComponent.java:193)
   at org.olat.core.gui.components.Window.doDispatchToComponent(Window.java:1132)
   at org.olat.core.gui.components.Window.dispatchRequest(Window.java:345)
   at org.olat.core.gui.components.Window.doDispatchRequest(Window.java:234)
   at org.olat.core.gui.components.AbstractComponent.dispatchRequest(AbstractComponent.java:193)