Index: lams_tool_mindmap/src/java/org/lamsfoundation/lams/tool/mindmap/dao/hibernate/MindmapRequestDAO.java
===================================================================
diff -u -r2f725f8ef2aa09a2663b2335bf67213074426d11 -rc18e6afc93561dc9bc2530cc58a37b276e712db3
--- lams_tool_mindmap/src/java/org/lamsfoundation/lams/tool/mindmap/dao/hibernate/MindmapRequestDAO.java	(.../MindmapRequestDAO.java)	(revision 2f725f8ef2aa09a2663b2335bf67213074426d11)
+++ lams_tool_mindmap/src/java/org/lamsfoundation/lams/tool/mindmap/dao/hibernate/MindmapRequestDAO.java	(.../MindmapRequestDAO.java)	(revision c18e6afc93561dc9bc2530cc58a37b276e712db3)
@@ -82,7 +82,8 @@
 	q.setParameter(1, sessionId);
 	q.setMaxResults(1);
 	Object result = q.uniqueResult();
-	return result != null ? ((Number) result).longValue() : null;
+	// must return a valid number or calling code will throw a null ptr exception.
+	return result != null ? ((Number) result).longValue() : 0L; 
     }
 
     @Override