diff --git a/lib/caditem.py b/lib/caditem.py
index b9d31fb..535fec3 100644
--- a/lib/caditem.py
+++ b/lib/caditem.py
@@ -153,11 +153,11 @@ class CadItem():
             red_ids = jsonobj["red_ids"]
             self.set_red_ids(red_ids)
 
-    def to_json(self):
+    def to_dict(self):
         jsonobj = dict()
 
         # die Oberflächendaten
-        gui_data = self.get_gui_dict()
+        gui_data = self.get_all_gui_data()
         jsonobj["gui_data"] = gui_data
 
         # die Impfdaten
@@ -171,19 +171,21 @@ class CadItem():
         # die ids der nicht migrierten Dateien
         red_ids = self.get_red_ids()
         jsonobj["red_ids"] = red_ids 
-        return json.dumps(jsonobj)
+        return jsonobj
+    def to_json(self):
+        obj = self.to_dict()
+        return json.dumps(obj)
 
     def load(self, path):
-       #try:
-       #    with open('data.json', 'r') as f:
-       #        self.model.todos = json.load(f)
-       #except Exception:
-       #    pass
-       pass
+       try:
+          with open(path, 'r') as f:
+              self.from_json(json.load(f))
+       except Exception:
+            raise Exception("guid_data, data, parent_children_mapping or red_ids not found")
+          
     def save(self, path):
-        #with open('data.json', 'w') as f:
-        #    data = json.dump(self.model.data, f)
-        pass
+        with open(path, 'w') as f:
+           json.dump(self.to_dict(), f)
 
 class CadItemRepository:
     """