Index: /SPARQLBuilderWWW/src/java/org/biohackathon/SPARQLBuilder/www/PLServlet.java
===================================================================
--- /SPARQLBuilderWWW/src/java/org/biohackathon/SPARQLBuilder/www/PLServlet.java (revision 256)
+++ /SPARQLBuilderWWW/src/java/org/biohackathon/SPARQLBuilder/www/PLServlet.java (revision 264)
@@ -74,26 +74,34 @@
         String st = request.getParameter("startclass");
         String en = request.getParameter("endclass");
-        String ask = request.getParameter("ask");
+        //String ask = request.getParameter("ask");
+        
+        // String
+        String uri = request.getQueryString();
+        System.out.println(uri);
         
         HttpSession session = request.getSession();
-        QueryPathGenerator qpg = (QueryPathGenerator)session.getAttribute("qpg");
-        if ( qpg == null ){
-            qpg = new QueryPathGenerator(ep);
-        }
+        //QueryPathGenerator qpg = (QueryPathGenerator)session.getAttribute("qpg");
+        //if ( qpg == null ){
+        QueryPathGenerator qpg = new QueryPathGenerator(ep);
+        //}
         SClass[] classes = qpg.getClasses(null);
+        qpg.setClassLabels(classes);
+        
         Path[] paths = null;
-        paths = qpg.getPaths(st, en, true);            
-            
-        String jsonstr = "[";
-	for(int i = 0; i< paths.length; i++){
-	    if (i > 0 && paths[i] != null){
-	        jsonstr += ",";
+        paths = qpg.getPaths(st, en);            
+        if ( paths == null ){
+            out.print(" ");
+        }else{
+            String jsonstr = "[";
+  	    for(int i = 0; i< paths.length; i++){
+	        if (i > 0 && paths[i] != null){
+	            jsonstr += ",";
+	        }
+                if ( paths[i] == null ){
+                    continue;
+                }
+                jsonstr += paths[i].toJSONString4(qpg);
 	    }
-            if ( paths[i] == null ){
-                continue;
-            }
-            jsonstr += paths[i].toJSONString4(qpg);
-	}
-	jsonstr += "]";
+	    jsonstr += "]";
         // For debug
         /*
@@ -101,5 +109,6 @@
         System.out.println(jsonstr);
         */
-        out.print(jsonstr);
+            out.print(jsonstr);
+        }
     }