Index: leahi_dialin/td/modules/events.py
===================================================================
diff -u -re45b20cdc5d4c5dcff8cef530b173ca94cb2e422 -r8ef0478470000c7e0de4dc05440521c955e18107
--- leahi_dialin/td/modules/events.py	(.../events.py)	(revision e45b20cdc5d4c5dcff8cef530b173ca94cb2e422)
+++ leahi_dialin/td/modules/events.py	(.../events.py)	(revision 8ef0478470000c7e0de4dc05440521c955e18107)
@@ -211,7 +211,7 @@
                 last_op_mode_message = op_modes_list[-1]
 
                 # Check if this is not the very first Sub Mode Change message
-                if len(sub_mode_list != 0):
+                if len(sub_mode_list) != 0:
                     # Get the timestamps of the last messages of both list for comparison
                     prev_op_mode_timestamp = datetime.strptime(last_op_mode_message[0], '%Y-%m-%d %H:%M:%S.%f')
                     prev_sub_mode_timestamp = datetime.strptime(sub_mode_list[-1][0], '%Y-%m-%d %H:%M:%S.%f')