diff --git a/src/org/ntlab/deltaExtractor/DeltaExtractor.java b/src/org/ntlab/deltaExtractor/DeltaExtractor.java
index 47cb66d..d9b0f78 100644
--- a/src/org/ntlab/deltaExtractor/DeltaExtractor.java
+++ b/src/org/ntlab/deltaExtractor/DeltaExtractor.java
@@ -858,6 +858,7 @@
 
 	private ExtractedStructure extractSub(TracePoint creationTracePoint, Reference targetRef, IAliasCollector aliasCollector) {
 		eStructure = new ExtractedStructure();
+		eStructure.setRelatedTracePoint(creationTracePoint);
 		ArrayList<String> objList = new ArrayList<String>(); 
 		srcObject = targetRef.getSrcObject();
 		dstObject = targetRef.getDstObject();
@@ -915,11 +916,12 @@
 	 * @return ���o����
 	 */
 	public ExtractedStructure extract(TracePoint thisTracePoint, ObjectReference anotherObj, IAliasCollector aliasCollector) {
+		eStructure = new ExtractedStructure();
+		eStructure.setRelatedTracePoint(thisTracePoint);
 		MethodExecution methodExecution = thisTracePoint.getMethodExecution();
 		if (!thisTracePoint.isMethodEntry()) {
 			thisTracePoint.stepNext();
 		}
-		eStructure = new ExtractedStructure();
 		ArrayList<String> objList = new ArrayList<String>();
 		String thisObjectId = methodExecution.getThisObjId();
 		objList.add(thisObjectId);