diff --git a/src/main/java/info/istlab/IoTP/SerialWindow.java b/src/main/java/info/istlab/IoTP/SerialWindow.java
index f6af559..058562d 100644
--- a/src/main/java/info/istlab/IoTP/SerialWindow.java
+++ b/src/main/java/info/istlab/IoTP/SerialWindow.java
@@ -305,12 +305,13 @@
 
     public static void disposeAll() {
         for (String key : SerialWindow.hash.keySet()) {
+            System.out.println("Dispose "+key);
             SerialWindow swin = SerialWindow.hash.get(key);
             if (swin != null) {
                 swin.disposeWin();
             }
         }
-        SerialWindow.hash.clear();
+        // SerialWindow.hash.clear();
     }
 
     public static void disposeByName(String serialName) {