anchor.diff:  			if (sNVType == null)
   				sNVType = "";
   			String sSelConcatChar = (String) session.getAttribute("sConcatChar");
  +			if (sSelConcatChar == null)
  +				sSelConcatChar = "";
   			String sSelRule = (String) session.getAttribute("sRule");
  +			if (sSelRule == null)
  +				sSelRule = "";
   			String sSelMethod = (String) session.getAttribute("sMethod");
  +			if (sSelMethod == null)
  +				sSelMethod = "";
   			Vector vRepType = new Vector();
   			Vector vDEComp = new Vector();
   			Vector vDECompID = new Vector();
  
positive.code: 			if ((sDDEAction != null) && (sDDEAction != "CreateNewDEFComp")) {
  				vRepType = (Vector) session.getAttribute("vRepType");
  				vDEComp = (Vector) session.getAttribute("vDEComp");
  				vDECompID = (Vector) session.getAttribute("vDECompID");
  				vDECompOrder = (Vector) session.getAttribute("vDECompOrder");
  				vDECompRelID = (Vector) session.getAttribute("vDECompRelID");
  			}
  
  			String sDEID = "";
  			String sDECompOrder = "";
  			if ((vDECompOrder != null) && (vDECompOrder.size() > 0))
  				sDECompOrder = (String) vDECompOrder.elementAt(0);
  
negative.code: 			    vCS = (Vector) session.getAttribute("vCS");
  			    vCS_ID = (Vector) session.getAttribute("vCS_ID");
  			    vSource = (Vector) session.getAttribute("vSource");
  	        }
  			Vector results = (Vector) session.getAttribute("results");
  			String sMenuAction = (String) session.getAttribute(Session_Data.SESSION_MENU_ACTION);
  			if (!isView) {
  