Index: lams_common/src/java/org/lamsfoundation/lams/web/filter/AccessPermissionFilter.java
===================================================================
diff -u -ra2ab7ae5cb56dc171f4fd9bebd18d5e1bbae89dd -rfb75bdb3528c552bb63152f89603bed3677132c7
--- lams_common/src/java/org/lamsfoundation/lams/web/filter/AccessPermissionFilter.java	(.../AccessPermissionFilter.java)	(revision a2ab7ae5cb56dc171f4fd9bebd18d5e1bbae89dd)
+++ lams_common/src/java/org/lamsfoundation/lams/web/filter/AccessPermissionFilter.java	(.../AccessPermissionFilter.java)	(revision fb75bdb3528c552bb63152f89603bed3677132c7)
@@ -111,8 +111,7 @@
 		ToolSession toolSession = getLamsToolService().getToolSession(toolSessionID);
 		Lesson lesson = toolSession.getLesson();
 		User user = getUser();
-
-		if ((toolSession.getLearners() != null) && toolSession.getLearners().contains(user)) {
+		if ((lesson != null) && (lesson.getAllLearners() != null) && lesson.getAllLearners().contains(user)) {
 		    if (AccessPermissionFilter.log.isTraceEnabled()) {
 			AccessPermissionFilter.log.trace("OK, user "
 				+ user.getLogin()