diff --git a/src/org/ntlab/deltaViewer/CollaborationLayout.java b/src/org/ntlab/deltaViewer/CollaborationLayout.java
index 6b428c8..bf3aad3 100644
--- a/src/org/ntlab/deltaViewer/CollaborationLayout.java
+++ b/src/org/ntlab/deltaViewer/CollaborationLayout.java
@@ -21,6 +21,7 @@
 import org.ntlab.trace.MethodInvocation;
 import org.ntlab.trace.Reference;
 import org.ntlab.trace.Statement;
+import org.ntlab.trace.TracePoint;
 
 import com.mxgraph.model.mxICell;
 import com.mxgraph.util.mxPoint;
@@ -37,37 +38,48 @@
 		padding = 200;
 		
 		// Extract the bottom reference.
-		Statement relatedSt = objectCallGraph.getRelatedPoints().get(objectCallGraph.getRelatedPoints().size() - 1).getStatement();
+		TracePoint relatedPt = objectCallGraph.getRelatedPoints().get(objectCallGraph.getRelatedPoints().size() - 1);
+		Statement relatedSt = relatedPt.getStatement();
 		String bottomSrcObjId = null;
 		String bottomDstObjId = null;
-		if (relatedSt instanceof FieldUpdate) {
-			// container to component
-			bottomSrcObjId = ((FieldUpdate) relatedSt).getContainerObjId();
-			bottomDstObjId = ((FieldUpdate) relatedSt).getValueObjId();
-		} else if (relatedSt instanceof ArrayUpdate) {
-			// container to component
-			bottomSrcObjId = ((ArrayUpdate) relatedSt).getArrayObjectId();
-			bottomDstObjId = ((ArrayUpdate) relatedSt).getValueObjectId();
-		} else if (relatedSt instanceof MethodInvocation) {
-			MethodInvocation methodInvStatement = (MethodInvocation) relatedSt;
-			MethodExecution calledMethodExec = methodInvStatement.getCalledMethodExecution();
-			String methodSignature = calledMethodExec.getSignature();
-			if (calledMethodExec.isCollectionType()
-					&& (methodSignature.contains("add(") 
-							|| methodSignature.contains("set(") 
-							|| methodSignature.contains("put(") 
-							|| methodSignature.contains("push(") 
-							|| methodSignature.contains("addElement("))) {
-				// container to component
-				bottomSrcObjId = calledMethodExec.getThisObjId();
-				bottomDstObjId = calledMethodExec.getArguments().get(0).getId();
-			} else {
-				// this to another
-				bottomSrcObjId = methodInvStatement.getThisObjId();
-				bottomDstObjId = calledMethodExec.getReturnValue().getId();
+		if (relatedPt.isMethodEntry()) {
+			// this to another (parameter)
+			Alias lastAlias = aliasCollector.getAliasList().get(aliasCollector.getAliasList().size() - 1);
+			if (lastAlias.getAliasType() == Alias.AliasType.FORMAL_PARAMETER) {
+				bottomSrcObjId = relatedPt.getMethodExecution().getThisObjId();
+				bottomDstObjId = lastAlias.getObjectId();
 			}
-		} else {
-			return;
+		}
+		if (bottomSrcObjId == null || bottomDstObjId == null) {
+			if (relatedSt instanceof FieldUpdate) {
+				// container to component
+				bottomSrcObjId = ((FieldUpdate) relatedSt).getContainerObjId();
+				bottomDstObjId = ((FieldUpdate) relatedSt).getValueObjId();
+			} else if (relatedSt instanceof ArrayUpdate) {
+				// container to component
+				bottomSrcObjId = ((ArrayUpdate) relatedSt).getArrayObjectId();
+				bottomDstObjId = ((ArrayUpdate) relatedSt).getValueObjectId();
+			} else if (relatedSt instanceof MethodInvocation) {
+				MethodInvocation methodInvStatement = (MethodInvocation) relatedSt;
+				MethodExecution calledMethodExec = methodInvStatement.getCalledMethodExecution();
+				String methodSignature = calledMethodExec.getSignature();
+				if (calledMethodExec.isCollectionType()
+						&& (methodSignature.contains("add(") 
+								|| methodSignature.contains("set(") 
+								|| methodSignature.contains("put(") 
+								|| methodSignature.contains("push(") 
+								|| methodSignature.contains("addElement("))) {
+					// container to component
+					bottomSrcObjId = calledMethodExec.getThisObjId();
+					bottomDstObjId = calledMethodExec.getArguments().get(0).getId();
+				} else {
+					// this to another
+					bottomSrcObjId = methodInvStatement.getThisObjId();
+					bottomDstObjId = calledMethodExec.getReturnValue().getId();
+				}
+			} else {
+				return;
+			}
 		}
 		
 		// Extract the reference access history.
diff --git a/src/org/ntlab/deltaViewer/CollaborationViewer.java b/src/org/ntlab/deltaViewer/CollaborationViewer.java
index 2483043..c47b7e7 100644
--- a/src/org/ntlab/deltaViewer/CollaborationViewer.java
+++ b/src/org/ntlab/deltaViewer/CollaborationViewer.java
@@ -534,7 +534,7 @@
 				// Judge AliasList contains relatedPoint. (If contains not to create edge.)
 				if (rpIndex < relatedPoints.size() - 1) {
 					TracePoint rp = relatedPoints.get(rpIndex);
-					Map.Entry<Reference, String> rpInf = getRelatedInformation(rp);
+					Map.Entry<Reference, String> rpInf = getRelatedInformation(rp, ac);
 					if (srcClassName.equals(rpInf.getKey().getSrcClassName()) && fieldName.equals(rpInf.getValue()) && curAliasObjId.equals(rpInf.getKey().getSrcObjectId()) && nextAliasObjId.equals(rpInf.getKey().getDstObjectId())) {
 						rpIndex++;
 						continue;
diff --git a/src/org/ntlab/deltaViewer/MagnetRONFrame.java b/src/org/ntlab/deltaViewer/MagnetRONFrame.java
index 25b5126..fa86c7f 100644
--- a/src/org/ntlab/deltaViewer/MagnetRONFrame.java
+++ b/src/org/ntlab/deltaViewer/MagnetRONFrame.java
@@ -565,7 +565,7 @@
 					if (objectCallGraph != null && aliasCollector != null) {
 						List<TracePoint> relatedPoints = objectCallGraph.getRelatedPoints();
 						TracePoint lastRP = relatedPoints.get(relatedPoints.size() - 1);
-						Map.Entry<Reference, String> rpInf = MagnetRONViewer.getRelatedInformation(lastRP);
+						Map.Entry<Reference, String> rpInf = MagnetRONViewer.getRelatedInformation(lastRP, aliasCollector);
 						if (WINDOW_TITLE.contains("extract delta of")) {
 							String[] splits = WINDOW_TITLE.split("extract delta of");
 							String featureName = splits[0];
@@ -631,7 +631,7 @@
 		if (ocg != null) {
 			List<TracePoint> relatedPoints = ocg.getRelatedPoints();
 			TracePoint lastRP = relatedPoints.get(relatedPoints.size() - 1);
-			Map.Entry<Reference, String> rpInf = MagnetRONViewer.getRelatedInformation(lastRP);
+			Map.Entry<Reference, String> rpInf = MagnetRONViewer.getRelatedInformation(lastRP, ac);
 			WINDOW_TITLE = "extract delta of:" + rpInf.getKey().getSrcClassName() + "(" + rpInf.getKey().getSrcObjectId() + ")" + " -> " + rpInf.getKey().getDstClassName()+ "(" + rpInf.getKey().getDstObjectId()+ ")";
 			setTitle(WINDOW_TITLE);
 		}
diff --git a/src/org/ntlab/deltaViewer/MagnetRONViewer.java b/src/org/ntlab/deltaViewer/MagnetRONViewer.java
index 743b3e9..0480dd2 100644
--- a/src/org/ntlab/deltaViewer/MagnetRONViewer.java
+++ b/src/org/ntlab/deltaViewer/MagnetRONViewer.java
@@ -33,6 +33,7 @@
 import org.ntlab.trace.FieldUpdate;
 import org.ntlab.trace.MethodExecution;
 import org.ntlab.trace.MethodInvocation;
+import org.ntlab.trace.ObjectReference;
 import org.ntlab.trace.Reference;
 import org.ntlab.trace.Statement;
 import org.ntlab.trace.TracePoint;
@@ -1549,7 +1550,7 @@
 		// TODO Auto-generated method stub
 	}
 	
-	public static Map.Entry<Reference, String> getRelatedInformation(TracePoint relatedPoint) {
+	public static Map.Entry<Reference, String> getRelatedInformation(TracePoint relatedPoint, IAliasCollector ac) {
 		Statement rpStatement = relatedPoint.getStatement();
 		String rpSrcObjId = null;
 		String rpDstObjId = null;
@@ -1558,53 +1559,71 @@
 		String rpFieldName = null;
 	
 		// Search for relatedPoint objectReference srcClassName, fieldName.
-		if(rpStatement instanceof FieldUpdate) {
-			// Format fieldName.
-			FieldUpdate rpFieldUpdateStatement = (FieldUpdate) rpStatement;
-			rpSrcObjId = rpFieldUpdateStatement.getContainerObjId();
-			rpDstObjId = rpFieldUpdateStatement.getValueObjId();
-			if (rpFieldUpdateStatement.getFieldName() != null) {
-				String rpFieldNames[] = formatFieldName(rpFieldUpdateStatement.getFieldName());
-				rpSrcClassName = rpFieldNames[0];
-				rpFieldName = rpFieldNames[rpFieldNames.length-1];
-			} else {
-				rpSrcClassName = rpFieldUpdateStatement.getContainerClassName();
+		if (relatedPoint.isMethodEntry()) {
+			// this to another (parameter)
+			Alias lastAlias = ac.getAliasList().get(ac.getAliasList().size() - 1);
+			if (lastAlias.getAliasType() == Alias.AliasType.FORMAL_PARAMETER) {
+				rpSrcObjId = relatedPoint.getMethodExecution().getThisObjId();
+				rpDstObjId = lastAlias.getObjectId();
 				rpFieldName = "";
-			}
-			rpDstClassName = rpFieldUpdateStatement.getValueClassName();
-		} else if (rpStatement instanceof ArrayUpdate) {
-			// container to component
-			ArrayUpdate rpArrayUpdateStatement = (ArrayUpdate) rpStatement;
-			rpSrcObjId = rpArrayUpdateStatement.getArrayObjectId();
-			rpDstObjId = rpArrayUpdateStatement.getValueObjectId();
-			rpSrcClassName = rpArrayUpdateStatement.getArrayClassName();
-			rpDstClassName = rpArrayUpdateStatement.getValueClassName();
-			rpFieldName = "[" + rpArrayUpdateStatement.getIndex() + "]";
-		} else if(rpStatement instanceof MethodInvocation) {
-			MethodInvocation rpMethodInvStatement = (MethodInvocation) rpStatement;
-			MethodExecution rpCalledMethodExec = rpMethodInvStatement.getCalledMethodExecution();
-			String rpMethodSig = rpCalledMethodExec.getSignature();
-
-			//Array��List�̂Ƃ��������x����t����i�m���ɕ������Ă�����̂Ƃ�)getSignature->contains("List.get(") || "Map.get(") <�z���C�g���X�g>
-//				if (rpMethodExec.getSignature().contains("List.add(") ||
-//						rpMethodExec.getSignature().contains("Map.put(")) {
-			if (rpCalledMethodExec.isCollectionType()
-					&& (rpMethodSig.contains("add(") 
-							|| rpMethodSig.contains("set(") 
-							|| rpMethodSig.contains("put(") 
-							|| rpMethodSig.contains("push(") 
-							|| rpMethodSig.contains("addElement("))) {
-				
-				rpSrcClassName = rpCalledMethodExec.getThisClassName();
-				rpDstClassName = rpCalledMethodExec.getArguments().get(0).getActualType();
-				rpSrcObjId = rpCalledMethodExec.getThisObjId();
-				rpDstObjId = rpCalledMethodExec.getArguments().get(0).getId();
-			} else {
-				// this to another
-				rpSrcClassName = rpMethodInvStatement.getThisClassName();
-				rpDstClassName = rpCalledMethodExec.getReturnValue().getActualType();
-				rpSrcObjId = rpMethodInvStatement.getThisObjId();
-				rpDstObjId = rpCalledMethodExec.getReturnValue().getId();
+				rpSrcClassName = relatedPoint.getMethodExecution().getThisClassName();
+				for (ObjectReference r: lastAlias.getMethodExecution().getArguments()) {
+					if (r.getId().equals(rpDstObjId)) {
+						rpDstClassName =  r.getActualType();
+						break;
+					}
+				}
+			}			
+		}
+		if (rpSrcObjId == null || rpDstObjId == null) {
+			if (rpStatement instanceof FieldUpdate) {
+				// Format fieldName.
+				FieldUpdate rpFieldUpdateStatement = (FieldUpdate) rpStatement;
+				rpSrcObjId = rpFieldUpdateStatement.getContainerObjId();
+				rpDstObjId = rpFieldUpdateStatement.getValueObjId();
+				if (rpFieldUpdateStatement.getFieldName() != null) {
+					String rpFieldNames[] = formatFieldName(rpFieldUpdateStatement.getFieldName());
+					rpSrcClassName = rpFieldNames[0];
+					rpFieldName = rpFieldNames[rpFieldNames.length-1];
+				} else {
+					rpSrcClassName = rpFieldUpdateStatement.getContainerClassName();
+					rpFieldName = "";
+				}
+				rpDstClassName = rpFieldUpdateStatement.getValueClassName();
+			} else if (rpStatement instanceof ArrayUpdate) {
+				// container to component
+				ArrayUpdate rpArrayUpdateStatement = (ArrayUpdate) rpStatement;
+				rpSrcObjId = rpArrayUpdateStatement.getArrayObjectId();
+				rpDstObjId = rpArrayUpdateStatement.getValueObjectId();
+				rpSrcClassName = rpArrayUpdateStatement.getArrayClassName();
+				rpDstClassName = rpArrayUpdateStatement.getValueClassName();
+				rpFieldName = "[" + rpArrayUpdateStatement.getIndex() + "]";
+			} else if(rpStatement instanceof MethodInvocation) {
+				MethodInvocation rpMethodInvStatement = (MethodInvocation) rpStatement;
+				MethodExecution rpCalledMethodExec = rpMethodInvStatement.getCalledMethodExecution();
+				String rpMethodSig = rpCalledMethodExec.getSignature();
+	
+				//Array��List�̂Ƃ��������x����t����i�m���ɕ������Ă�����̂Ƃ�)getSignature->contains("List.get(") || "Map.get(") <�z���C�g���X�g>
+//					if (rpMethodExec.getSignature().contains("List.add(") ||
+//							rpMethodExec.getSignature().contains("Map.put(")) {
+				if (rpCalledMethodExec.isCollectionType()
+						&& (rpMethodSig.contains("add(") 
+								|| rpMethodSig.contains("set(") 
+								|| rpMethodSig.contains("put(") 
+								|| rpMethodSig.contains("push(") 
+								|| rpMethodSig.contains("addElement("))) {
+					
+					rpSrcClassName = rpCalledMethodExec.getThisClassName();
+					rpDstClassName = rpCalledMethodExec.getArguments().get(0).getActualType();
+					rpSrcObjId = rpCalledMethodExec.getThisObjId();
+					rpDstObjId = rpCalledMethodExec.getArguments().get(0).getId();
+				} else {
+					// this to another
+					rpSrcClassName = rpMethodInvStatement.getThisClassName();
+					rpDstClassName = rpCalledMethodExec.getReturnValue().getActualType();
+					rpSrcObjId = rpMethodInvStatement.getThisObjId();
+					rpDstObjId = rpCalledMethodExec.getReturnValue().getId();
+				}
 			}
 		}
 		return new AbstractMap.SimpleEntry<>(new Reference(rpSrcObjId, rpDstObjId, rpSrcClassName, rpDstClassName), rpFieldName);