diff --git a/src/main/java/net/onrc/onos/graph/DBOperation.java b/src/main/java/net/onrc/onos/graph/DBOperation.java
index d965ad5..f92260d 100644
--- a/src/main/java/net/onrc/onos/graph/DBOperation.java
+++ b/src/main/java/net/onrc/onos/graph/DBOperation.java
@@ -190,6 +190,7 @@
 	*/
 	@Override
 	public IFlowPath newFlowPath() {
+	    System.out.println("newFlowPath");
 	    IFlowPath flowPath = (IFlowPath)conn.getFramedGraph().addVertex(null, IFlowPath.class);
 	    if (flowPath != null) {
 		flowPath.setType("flow");
@@ -255,6 +256,7 @@
 	 */
 	@Override
 	public IFlowPath searchFlowPath(final FlowId flowId) {
+	    System.out.println("searchFlowPath");
 	    return conn.getFramedGraph().getVertices("flow_id", flowId.toString()).iterator().hasNext()
 		    ? (IFlowPath) conn.getFramedGraph().getVertices("flow_id", flowId.toString(),
 		    IFlowPath.class).iterator().next() : null;
@@ -265,6 +267,7 @@
 	 */
 	@Override
 	public Iterable<IFlowPath> getAllFlowPaths() {
+	    System.out.println("getAllFlowPaths");
 	    Iterable<IFlowPath> flowPaths = conn.getFramedGraph().getVertices("type", "flow", IFlowPath.class);
 
 	    List<IFlowPath> nonNullFlows = new ArrayList<IFlowPath>();
@@ -292,6 +295,7 @@
 	 */
 	@Override
 	public IFlowEntry searchFlowEntry(FlowEntryId flowEntryId) {
+	    System.out.println("searchFlowEntry");
 	    return conn.getFramedGraph().getVertices("flow_entry_id", flowEntryId.toString()).iterator().hasNext()
 		    ? (IFlowEntry)conn.getFramedGraph().getVertices("flow_entry_id", flowEntryId.toString(),
 		    IFlowEntry.class).iterator().next() : null;
@@ -319,6 +323,7 @@
 	 */
 	@Override
 	public IFlowEntry newFlowEntry() {
+	    System.out.println("newFlowEntry");
 	    IFlowEntry flowEntry = (IFlowEntry) conn.getFramedGraph().addVertex(null, IFlowEntry.class);
 	    if (flowEntry != null) {
 		flowEntry.setType("flow_entry");
diff --git a/src/main/java/net/onrc/onos/ofcontroller/flowmanager/FlowDatabaseOperation.java b/src/main/java/net/onrc/onos/ofcontroller/flowmanager/FlowDatabaseOperation.java
index 7b3904b..dd56241 100644
--- a/src/main/java/net/onrc/onos/ofcontroller/flowmanager/FlowDatabaseOperation.java
+++ b/src/main/java/net/onrc/onos/ofcontroller/flowmanager/FlowDatabaseOperation.java
@@ -45,7 +45,9 @@
 	IFlowPath flowObj = null;
 	boolean found = false;
 	try {
-	    if ((flowObj = dbHandler.searchFlowPath(flowPath.flowId())) != null) {
+	    flowObj = dbHandler.searchFlowPath(flowPath.flowId());
+	    System.out.println("flowObj : " + flowObj);
+	    if (flowObj != null) {
 		System.out.println("found = true");
 		found = true;
 	    } else {