diff --git a/lib/controller.py b/lib/controller.py
index d3c5ae4..4af5102 100644
--- a/lib/controller.py
+++ b/lib/controller.py
@@ -1,4 +1,5 @@
 import  os
+from tkinter import messagebox
 
 from manage_configs import SivasAssemblyData
 from get_teilestamm import FetchSivasTeilestamm
@@ -197,10 +198,10 @@ class Controller(Observer):
         pass
 
     def message_info(self, title, key, questions='ok'):
-        return tkinter.messageBox.showinfo(title, message[key])
+        return messagebox.showinfo(title, messages[key])
 
-    def message_error(self, title, key, type='error'):
-        pass
+    def message_error(self, title, key):
+        return messagebox.showerror(title, messages[key])
 
     def callback(self, key, value):
         if not self._model: