Index: MsgDefs.h
===================================================================
diff -u -r8fc441b150d7a6aedf415c329ada5c29da99bf27 -r634393e80aa39b1552715b348fc68b6b38a5d529
--- MsgDefs.h	(.../MsgDefs.h)	(revision 8fc441b150d7a6aedf415c329ada5c29da99bf27)
+++ MsgDefs.h	(.../MsgDefs.h)	(revision 634393e80aa39b1552715b348fc68b6b38a5d529)
@@ -563,14 +563,14 @@
     REQUEST_REJECT_REASON_PARAM_OUT_OF_RANGE = 17,                      ///< A treatment parameter is out of range
     REQUEST_REJECT_REASON_HEPARIN_PRESTOP_EXCEEDS_DURATION = 18,        ///< The Heparin pre-stop setting is greater than the treatment duration
     REQUEST_REJECT_REASON_DG_FILTER_FLUSH_HAS_BEEN_EXPIRED = 19,        ///< DG filter flush time has been expired
-    REQUEST_REJECT_REASON_AVAILABLE_2 = 20,                             ///< Not used
-    REQUEST_REJECT_REASON_SALINE_MAX_VOLUME_REACHED = 21,               ///< Saline bolus volume maximum has been reached - no more saline allowed
+    REQUEST_REJECT_REASON_SALINE_BOLUS_NOT_ALLOWED = 20,                ///< Saline bolus is not allowed (due to blood and dialysate recirculation blockage)
+    REQUEST_REJECT_REASON_AVAILABLE_3 = 21,                             ///< Not used
     REQUEST_REJECT_REASON_SALINE_BOLUS_NOT_IN_PROGRESS = 22,            ///< A saline bolus is not in progress
     REQUEST_REJECT_REASON_ACTION_DISABLED_IN_CURRENT_STATE = 23,        ///< Requested user action is disabled in current state
     REQUEST_REJECT_REASON_ALARM_IS_ACTIVE = 24,                         ///< Requested user action not allowed while alarm is active
     REQUEST_REJECT_REASON_INVALID_COMMAND = 25,                         ///< Requested user action invalid
     REQUEST_REJECT_REASON_TREATMENT_IS_COMPLETED = 26,                  ///< The treatment has been completed
-    REQUEST_REJECT_REASON_ADDL_RINSEBACK_MAX_VOLUME_REACHED = 27,       ///< Rinseback additional volume maximum has been reached - no more additional rinsebacks allowed
+    REQUEST_REJECT_REASON_AVAILABLE_4 = 27,                             ///< Not used
     REQUEST_REJECT_REASON_DIALYZER_NOT_INVERTED = 28,                   ///< Dialyzer not inverted yet
     REQUEST_REJECT_REASON_NO_PATIENT_CONNECTION_CONFIRM = 29,           ///< The user has not confirmed patient connection
     REQUEST_REJECT_REASON_HEPARIN_PAUSE_INVALID_IN_THIS_STATE = 30,     ///< Heparin cannot be paused if not currently deliverying Heparin