Index: /BH13SPARQLBuilder/src/hozo/sparql/gui/SparqlBuilderPanel.java
===================================================================
--- /BH13SPARQLBuilder/src/hozo/sparql/gui/SparqlBuilderPanel.java (revision 44)
+++ /BH13SPARQLBuilder/src/hozo/sparql/gui/SparqlBuilderPanel.java (revision 54)
@@ -329,5 +329,7 @@
 public String createSPARQL(Path path, int num) throws Exception {
 		
-		
+		if( path == null ){
+			throw new Exception("Path is null.");
+		}
 		String startClass = path.getStartClass();
 		List<ClassLink> classLinks = path.getClassLinks();
Index: /BH13SPARQLBuilder/src/org/biohackathon/SPARQLBuilder/OWL/OWLQueryBuilderImpl.java
===================================================================
--- /BH13SPARQLBuilder/src/org/biohackathon/SPARQLBuilder/OWL/OWLQueryBuilderImpl.java (revision 49)
+++ /BH13SPARQLBuilder/src/org/biohackathon/SPARQLBuilder/OWL/OWLQueryBuilderImpl.java (revision 54)
@@ -407,5 +407,5 @@
 		queryStr.append("    ?p ?pDirection ?c.\n");
 
-		queryStr.append("  ?s rdf:type ?c.\n");
+//		queryStr.append("  ?s rdf:type ?c.\n");
 
 		if (countLinks) {
Index: /BH13SPARQLBuilder/src/org/biohackathon/SPARQLBuilder/OWL/ClassLink.java
===================================================================
--- /BH13SPARQLBuilder/src/org/biohackathon/SPARQLBuilder/OWL/ClassLink.java (revision 49)
+++ /BH13SPARQLBuilder/src/org/biohackathon/SPARQLBuilder/OWL/ClassLink.java (revision 54)
@@ -90,5 +90,5 @@
 		sb.append(numOfLinkedClassInstances);
 		sb.append("]");
-return sb.toString();
+		return sb.toString();
 	}