diff --git a/force_bdss/core_plugins/dummy/ui_notification/ui_notification.py b/force_bdss/core_plugins/dummy/ui_notification/ui_notification.py
index 8e21584b45c4365f52a8f5697da60650fe9ce5cb..0553339742501bdd8be79f5f39460167cef6f40f 100644
--- a/force_bdss/core_plugins/dummy/ui_notification/ui_notification.py
+++ b/force_bdss/core_plugins/dummy/ui_notification/ui_notification.py
@@ -51,11 +51,13 @@ class UINotification(BaseNotificationListener):
 
     def _format_event(self, event):
         if isinstance(event, MCOStartEvent):
-            data = "MCO_START"
+            data = "MCO_START\n"
         elif isinstance(event, MCOFinishEvent):
-            data = "MCO_FINISH"
+            data = "MCO_FINISH\n"
         elif isinstance(event, MCOProgressEvent):
-            data = "MCO_PROGRESS {} {}".format(event.input, event.output)
+            data = "MCO_PROGRESS\n{}\n{}\n".format(
+                " ".join([str(x) for x in event.input]),
+                " ".join([str(x) for x in event.output]))
         else:
             return None