Index: leahi_dialin/td/modules/events.py
===================================================================
diff -u -r3e6eac0e751fd74569068bc8754f0828cd4fcd84 -r1f7b5ac840adf6740b023706fcb73691c33a9be7
--- leahi_dialin/td/modules/events.py	(.../events.py)	(revision 3e6eac0e751fd74569068bc8754f0828cd4fcd84)
+++ leahi_dialin/td/modules/events.py	(.../events.py)	(revision 1f7b5ac840adf6740b023706fcb73691c33a9be7)
@@ -210,7 +210,7 @@
                 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')