Index: lams_tool_lamc/src/java/org/lamsfoundation/lams/tool/mc/web/AuthoringUtil.java
===================================================================
diff -u -r57787015c987230b0f67974db036080073fa5871 -r040ac7547bf415395fc93b1794544663f9440710
--- lams_tool_lamc/src/java/org/lamsfoundation/lams/tool/mc/web/AuthoringUtil.java	(.../AuthoringUtil.java)	(revision 57787015c987230b0f67974db036080073fa5871)
+++ lams_tool_lamc/src/java/org/lamsfoundation/lams/tool/mc/web/AuthoringUtil.java	(.../AuthoringUtil.java)	(revision 040ac7547bf415395fc93b1794544663f9440710)
@@ -2737,5 +2737,14 @@
     	request.getSession().removeAttribute(USER_EXCEPTION_DEFAULTCONTENT_NOTSETUP);
     	request.getSession().removeAttribute(USER_EXCEPTION_DEFAULTQUESTIONCONTENT_NOT_AVAILABLE);
     	request.getSession().removeAttribute(USER_EXCEPTION_DEFAULTOPTIONSCONTENT_NOT_AVAILABLE);
+
+    	/* the attributes below used in the Preview mode*/
+    	request.getSession().removeAttribute(MAP_QUESTION_CONTENT_LEARNER);
+    	request.getSession().removeAttribute(TOTAL_QUESTION_COUNT);
+    	request.getSession().removeAttribute(CURRENT_QUESTION_INDEX);
+    	request.getSession().removeAttribute(MAP_GENERAL_OPTIONS_CONTENT);
+    	request.getSession().removeAttribute(MAP_OPTIONS_CONTENT);
+    	request.getSession().removeAttribute(QUESTION_LISTING_MODE_COMBINED);
+    	request.getSession().removeAttribute(PREVIEW_ONLY);
     }
 }