RS adding a course to a group in batch mode

2015-01-08 10:58:59,588 [ajp-bio-8006-exec-33] ERROR OLATRuntimeException - OLAT::ERROR ^%^ N1-E618 ^%^ org.olat.core.logging 
Mozilla/5.0 (Windows NT 5.1; rv:24.0) Gecko/20100101 Firefox/24.0

**RedScreen** org.hibernate.LazyInitializationException: could not initialize proxy - no Session

<dispatchinfo>
	<componentinfo>
		<compname>ffo_main_stepslayout</compname>
		<compclass>org.olat.core.gui.components.form.flexible.impl.FormWrapperContainer</compclass>
		<extendedinfo>n/a</extendedinfo>
		<event>
			<class&gt;org.olat.core.gui.control.Event</class&gt;
			<command>validation finish</command>
			<tostring>com:validation finish,org.olat.core.gui.control.Event@2f96e239</tostring>
		</event>
	</componentinfo>
	<controllerinfo>
		<controllername>org.olat.group.ui.wizard.BGConfigResourcesStepController</controllername>
		<controllername>org.olat.core.gui.control.generic.wizard.StepsMainRunController</controllername>
		<controllername>org.olat.course.member.CourseBusinessGroupListController</controllername>
		<controllername>org.olat.course.member.MembersManagementMainController</controllername>
		<controllername>org.olat.course.run.CourseRuntimeController</controllername>
		<controllername>org.olat.core.commons.fullWebApp.BaseFullWebappController</controllername>
	</controllerinfo>
</dispatchinfo>

>>> stack of 1.cause::org.olat.core.logging.OLATRuntimeException: org.hibernate.LazyInitializationException: could not initialize proxy - no Session
-> 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:524)
   at org.olat.core.gui.components.Window.doDispatchRequest(Window.java:228)
   at org.olat.core.gui.components.AbstractComponent.dispatchRequest(AbstractComponent.java:192)
   at org.olat.dispatcher.AuthenticatedDispatcher.processValidDispatchURI(AuthenticatedDispatcher.java:241)
   at org.olat.dispatcher.AuthenticatedDispatcher.execute(AuthenticatedDispatcher.java:197)
   at org.olat.core.servlets.OpenOLATServlet.executeUserRequest(OpenOLATServlet.java:269)
   at org.olat.core.servlets.OpenOLATServlet.doPost(OpenOLATServlet.java:212)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
>>> stack of 2.cause::javax.persistence.PersistenceException: org.hibernate.LazyInitializationException: could not initialize proxy - no Session
-> at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1763)
   at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1677)
   at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1683)
   at org.hibernate.jpa.spi.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:1187)
   at org.olat.repository.manager.RepositoryEntryRelationDAO.createRelation(RepositoryEntryRelationDAO.java:305)
   at org.olat.group.manager.BusinessGroupRelationDAO.addRelationToResource(BusinessGroupRelationDAO.java:70)
   at org.olat.group.manager.BusinessGroupServiceImpl.addResourceTo(BusinessGroupServiceImpl.java:1498)
   at org.olat.group.manager.BusinessGroupServiceImpl.addResourcesTo(BusinessGroupServiceImpl.java:1522)
   at org.olat.group.ui.main.AbstractBusinessGroupListController$2.execute(AbstractBusinessGroupListController.java:766)
   at org.olat.core.gui.control.generic.wizard.StepsMainRunController.finishWizard(StepsMainRunController.java:370)
   at org.olat.core.gui.control.generic.wizard.StepsMainRunController.event(StepsMainRunController.java:353)
>>> stack of 3.cause::org.hibernate.LazyInitializationException: could not initialize proxy - no Session
-> at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:165)
   at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:286)
   at org.hibernate.engine.internal.ForeignKeys$Nullifier.isNullifiable(ForeignKeys.java:158)
   at org.hibernate.engine.internal.ForeignKeys$Nullifier.access$000(ForeignKeys.java:51)
   at org.hibernate.engine.internal.ForeignKeys.collectNonNullableTransientEntities(ForeignKeys.java:361)
   at org.hibernate.engine.internal.ForeignKeys.findNonNullableTransientEntities(ForeignKeys.java:334)
   at org.hibernate.action.internal.AbstractEntityInsertAction.findNonNullableTransientEntities(AbstractEntityInsertAction.java:107)
   at org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:176)
   at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:166)
   at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:332)
   at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:288)