Index: SPARQLBuilderWWW/src/java/org/biohackathon/SPARQLBuilder/OWL/ClassLink.java
===================================================================
--- SPARQLBuilderWWW/src/java/org/biohackathon/SPARQLBuilder/OWL/ClassLink.java (revision 167)
+++ SPARQLBuilderWWW/src/java/org/biohackathon/SPARQLBuilder/OWL/ClassLink.java (revision 171)
@@ -143,5 +143,5 @@
                 //if ( linkedClassURI != null ){
                     String label = getLinkedClassLabel(classes);
-                    json_str+="\"nodelabel\":"+"\""+label+"\"";
+                    json_str+="\"nodeLabel\":"+"\""+label+"\"";
                 //}
 	//	json_str+="\"numOfLinks\":"+"\""+numOfLinks+"\",";
Index: SPARQLBuilderWWW/src/java/org/biohackathon/SPARQLBuilder/www/PLServlet.java
===================================================================
--- SPARQLBuilderWWW/src/java/org/biohackathon/SPARQLBuilder/www/PLServlet.java (revision 168)
+++ SPARQLBuilderWWW/src/java/org/biohackathon/SPARQLBuilder/www/PLServlet.java (revision 171)
@@ -80,8 +80,12 @@
         String jsonstr = "{\"paths\":[";
 	for(int i = 0; i< paths.length; i++){
-	    if (i > 0 ){
+	    if (i > 0 && paths[i] != null){
 	        jsonstr += ",";
 	    }
 	    //jsonstr += paths[i].toJSONString2();
+            if ( paths[i] == null ){
+                continue;
+                //System.out.println("here");
+            }
             jsonstr += paths[i].toJSONString3(classes);
 	}