Index: lams_tool_nb/src/java/org/lamsfoundation/lams/tool/noticeboard/util/NbWebUtil.java
===================================================================
diff -u -rcea445ecc91b0a6d738ad7123d90a4080f97f288 -r925813a67f292060b83079d68f5b294fc6d8ffc5
--- lams_tool_nb/src/java/org/lamsfoundation/lams/tool/noticeboard/util/NbWebUtil.java	(.../NbWebUtil.java)	(revision cea445ecc91b0a6d738ad7123d90a4080f97f288)
+++ lams_tool_nb/src/java/org/lamsfoundation/lams/tool/noticeboard/util/NbWebUtil.java	(.../NbWebUtil.java)	(revision 925813a67f292060b83079d68f5b294fc6d8ffc5)
@@ -52,8 +52,15 @@
 
 	 	public static Long convertToLong(String toolContentId)
 	 	{
-	 		Long contentId = new Long(Long.parseLong(toolContentId));
-	 		return contentId;
+	 	    try
+	 	    {
+	 	        return new Long(toolContentId);
+	 	    }
+	 	    catch (NumberFormatException e)
+	 	    {
+	 	        return null;
+	 	    }
+	 		
 	 	}
 	 	
 	 	public static void cleanAuthoringSession(HttpServletRequest request)