RS in assessment mode list

2015-10-21 21:48:04,557 [ajp-nio2-8048-exec-10] ERROR Window - OLAT::ERROR ^%^ N48-E65 ^%^ org.olat.core.gui.components 
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:41.0) Gecko/20100101 Firefox/41.0 ^%^ **RedScreen** exception while rendering component 'table' (org.olat.core.gui.components.form.flexible.impl.elements.table.FlexiTableComponent) listener:[]<br />Message of exception: could not initialize proxy - no Session ::_:: ::_:: ^%^ 
>>> stack of 1.cause::org.olat.core.logging.OLATRuntimeException: exception while rendering component 'table' (org.olat.core.gui.components.form.flexible.impl.elements.table.FlexiTableComponent) listener:[]<br />Message of exception: could not initialize proxy - no Session
-> at org.olat.core.gui.components.Window.dispatchRequest(Window.java:769)
   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.doGet(OpenOLATServlet.java:209)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
   at org.olat.core.servlets.OpenOLATServlet.service(OpenOLATServlet.java:166)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
   at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
>>> stack of 2.cause::org.hibernate.LazyInitializationException: could not initialize proxy - no Session
-> at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:165)
   at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:286)
   at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:185)
   at org.olat.repository.RepositoryEntry_$$_jvst176_c.getOlatResource(RepositoryEntry_$$_jvst176_c.java)
   at org.olat.course.assessment.ui.AssessmentModeListModel.getValueAt(AssessmentModeListModel.java:76)
   at org.olat.course.assessment.ui.AssessmentModeListModel.getValueAt(AssessmentModeListModel.java:66)
   at org.olat.core.gui.components.form.flexible.impl.elements.table.FlexiTableClassicRenderer.renderCell(FlexiTableClassicRenderer.java:209)
   at org.olat.core.gui.components.form.flexible.impl.elements.table.FlexiTableClassicRenderer.renderRow(FlexiTableClassicRenderer.java:159)
   at org.olat.core.gui.components.form.flexible.impl.elements.table.AbstractFlexiTableRenderer.renderBody(AbstractFlexiTableRenderer.java:356)
   at org.olat.core.gui.components.form.flexible.impl.elements.table.AbstractFlexiTableRenderer.render(AbstractFlexiTableRenderer.java:84)
   at org.olat.core.gui.components.form.flexible.impl.elements.table.FlexiTableClassicRenderer.render(FlexiTableClassicRenderer.java:53)