diff --git a/mbEditorPro2.0/mbEditorPro.py b/mbEditorPro2.0/mbEditorPro.py
index dd685e2..b4784a2 100644
--- a/mbEditorPro2.0/mbEditorPro.py
+++ b/mbEditorPro2.0/mbEditorPro.py
@@ -295,7 +295,10 @@ def test_czones():
         arc_out = ArcZone()
 
         arc_in.load_binary(in_stream)
-        parsed = arc_in.save_json()
+        unread = len(data) - in_stream.buffer.tell()
+        if unread:
+            print(res_id, 'unread bytes:', unread)
+        parsed = json.loads(json.dumps(arc_in.save_json()))
         arc_out.load_json(parsed)
         arc_out.save_binary(out_stream)
         try: