diff --git a/src/org/ntlab/deltaViewer/CollaborationObjectCallGraph.java b/src/org/ntlab/deltaViewer/CollaborationObjectCallGraph.java
index ff118a1..64379ee 100644
--- a/src/org/ntlab/deltaViewer/CollaborationObjectCallGraph.java
+++ b/src/org/ntlab/deltaViewer/CollaborationObjectCallGraph.java
@@ -175,15 +175,25 @@
 			String srcClassName = ref.getSrcClassName();
 			String srcObjId = ref.getSrcObjectId();
 			boolean isFirstRef = true;
-			for (int j = 0; j < collectionReferences.size(); j++) {
-				if (collectionReferences.indexOf(ref) != j) {
-					Reference compareRef = collectionReferences.get(j);
-					if (srcClassName.equals(compareRef.getDstClassName())
-							&& srcObjId.equals(compareRef.getDstObjectId())) {
-						isFirstRef = false;
-						break;
+			int idx = 0;
+			int cnt = 0;
+			// Count "$" in srcClassName and don't shrink References too much(JHotDrawTransform).
+			while(true) {
+			    idx = srcClassName.indexOf("$", idx) + 1;
+			    if (idx == 0) break;
+			    cnt++;
+			}
+			if (cnt != 1) {
+				for (int j = 0; j < collectionReferences.size(); j++) {
+					if (collectionReferences.indexOf(ref) != j) {
+						Reference compareRef = collectionReferences.get(j);
+						if (srcClassName.equals(compareRef.getDstClassName())
+								&& srcObjId.equals(compareRef.getDstObjectId())) {
+							isFirstRef = false;
+							break;
+						}
 					}
-				}
+				}				
 			}
 			if (isFirstRef) {
 				List<Reference> collectionChain = new ArrayList<>();
diff --git a/src/tests/CollaborationObjectCallGraphTest.java b/src/tests/CollaborationObjectCallGraphTest.java
index 6b1662a..0f40811 100644
--- a/src/tests/CollaborationObjectCallGraphTest.java
+++ b/src/tests/CollaborationObjectCallGraphTest.java
@@ -28,7 +28,8 @@
 		// Change Here!
 //		String key = "getterOverlap";
 //		String key = "setterOverlap";
-		String key = "ArgoUMLDelete";
+//		String key = "ArgoUMLDelete";
+		String key = "JHotDrawTransform";
 //		String key = "JHotDrawSelect";
 		MagnetRONFrameTest magnetRONFrame = new MagnetRONFrameTest();
 		Map<ExtractedStructure, IAliasCollector> extractedMultipleDeltas = magnetRONFrame.extractMultipleDeltas(key);
diff --git a/src/tests/MagnetRONFrameTest.java b/src/tests/MagnetRONFrameTest.java
index f39f60f..f2e197c 100644
--- a/src/tests/MagnetRONFrameTest.java
+++ b/src/tests/MagnetRONFrameTest.java
@@ -207,6 +207,7 @@
 		String[] ArgoUMLDelete1 = {null, null, "public void org.argouml.uml.diagram.ui.ActionRemoveFromDiagram.actionPerformed(", "org.argouml.uml.diagram.static_structure.ui.FigClass", "traces\\ArgoUMLBenchmarkWithMoreStandardClasses.trace", THIS_ANOTHER}; map.put("ArgoUMLDelete1", ArgoUMLDelete1);// ArgoUML �폜�@�\1 (this to another)
 		String[] ArgoUMLDelete2 = {"450474599", "1675174935", "java.util.Vector", "org.argouml.uml.diagram.static_structure.ui.FigClass", "traces\\ArgoUMLBenchmarkWithMoreStandardClasses.trace", CONTAINER_COMPONENT_COLLECTION}; map.put("ArgoUMLDelete2", ArgoUMLDelete2); // ArgoUML �폜�@�\2 (collection)
 		String[] JHotDrawTransform = {"176893671", "1952912699", "java.util.HashSet", "org.jhotdraw.draw.RectangleFigure", "traces\\jHotDrawBenchmarkWithMoreStandardClasses.trace", CONTAINER_COMPONENT_COLLECTION}; map.put("JHotDrawTransform", JHotDrawTransform); // JHotDraw �ړ��@�\ (collection)
+		String[] JHotDrawSelect1 = {"758826749", "1952912699", "org.jhotdraw.draw.tool.DefaultDragTracker", "org.jhotdraw.draw.RectangleFigure", "traces\\jHotDrawBenchmarkWithMoreStandardClasses.trace", CONTAINER_COMPONENT}; map.put("JHotDrawSelect1", JHotDrawSelect1); // JHotDraw �I���@�\1
 		String[] JHotDrawSelect2 = {"1378082106", "1952912699", "java.util.HashSet", "org.jhotdraw.draw.RectangleFigure", "traces\\jHotDrawBenchmarkWithMoreStandardClasses.trace", CONTAINER_COMPONENT_COLLECTION}; map.put("JHotDrawSelect2", JHotDrawSelect2); // JHotDraw �I���@�\2 (collection)
 		String[] JHotDrawSelect3 = {"599587451", "758826749", "org.jhotdraw.draw.tool.DelegationSelectionTool", "org.jhotdraw.draw.tool.DefaultDragTracker", "traces\\jHotDrawBenchmarkWithMoreStandardClasses.trace", CONTAINER_COMPONENT}; map.put("JHotDrawSelect3", JHotDrawSelect3); // JHotDraw �I���@�\3 (collection)
 		String[] JHotDrawSelect4 = {"1787265837", "1952912699", "java.util.LinkedHashSet", "org.jhotdraw.draw.RectangleFigure", "traces\\jHotDrawBenchmarkWithMoreStandardClasses.trace", CONTAINER_COMPONENT_COLLECTION}; map.put("JHotDrawSelect4", JHotDrawSelect4); // JHotDraw �I���@�\4 (collection)
@@ -218,6 +219,6 @@
 		argsKeysMap.put("setterOverlap", new ArrayList<String>(Arrays.asList("setterOverlap1", "setterOverlap2")));
 		argsKeysMap.put("ArgoUMLDelete", new ArrayList<String>(Arrays.asList("ArgoUMLDelete1", "ArgoUMLDelete2")));
 		argsKeysMap.put("JHotDrawTransform", new ArrayList<String>(Arrays.asList("JHotDrawTransform")));	
-		argsKeysMap.put("JHotDrawSelect", new ArrayList<String>(Arrays.asList("JHotDrawSelect3,1", "JHotDrawSelect4")));	
+		argsKeysMap.put("JHotDrawSelect", new ArrayList<String>(Arrays.asList("JHotDrawSelect1,1", "JHotDrawSelect2", "JHotDrawSelect3,1", "JHotDrawSelect4")));	
 	}
 }