Index: MsgDefs.h
===================================================================
diff -u -r4a07e2337f10451bf526118eb87e70704cbc4a1a -rb90ea8aa9208ff65e5c356ccb1ebbbbca5b464e7
--- MsgDefs.h	(.../MsgDefs.h)	(revision 4a07e2337f10451bf526118eb87e70704cbc4a1a)
+++ MsgDefs.h	(.../MsgDefs.h)	(revision b90ea8aa9208ff65e5c356ccb1ebbbbca5b464e7)
@@ -300,7 +300,7 @@
     MSG_ID_DD_TEMPERATURE_SENSOR_MEASURED_TEMPERATURE_OVERRIDE_REQUEST = 0xA019,    ///< DD temperature sensor measured temperature override request
     MSG_ID_DD_TEMPERATURE_SENSOR_READ_COUNTER_OVERRIDE_REQUEST = 0xA01A,            ///< DD temperature sensor read counter override request
     MSG_ID_DD_TEMPERATURE_SENSOR_FILTERED_TEMP_OVERRIDE_REQUEST = 0xA01B,           ///< DD temperature sensor filtered temperature override request.
-    MSG_ID_DD_AVAILABLE_3 = 0xA01C,                                                 ///< DD Msg ID not used - available for use.
+    MSG_ID_DD_SET_OPERATION_SUB_MODE_OVERRIDE_REQUEST = 0xA01C,                     ///< DD set new operation sub mode override request
     MSG_ID_DD_DIALYSATE_PUMPS_PUBLISH_INTERVAL_OVERRIDE_REQUEST = 0xA01D,           ///< DD dialysate pumps data publish interval override request
     MSG_ID_DD_DIALYSATE_PUMPS_TARGET_SPEED_OVERRIDE_REQUEST = 0xA01E,               ///< DD dialysate pumps target speed override request
     MSG_ID_DD_DIALYSATE_PUMPS_MEASURED_SPEED_OVERRIDE_REQUEST = 0xA01F,             ///< DD dialysate pumps measured speed override request