Index: MsgDefs.h
===================================================================
diff -u -r73ef0c58ea2b67ec0115fbd1504eb72d2a635737 -rddf7cec3d714b32112d6a737d92584c636b42bc2
--- MsgDefs.h	(.../MsgDefs.h)	(revision 73ef0c58ea2b67ec0115fbd1504eb72d2a635737)
+++ MsgDefs.h	(.../MsgDefs.h)	(revision ddf7cec3d714b32112d6a737d92584c636b42bc2)
@@ -45,6 +45,9 @@
     MSG_ID_USER_SALINE_BOLUS_RESPONSE = 0x14,                           ///< HD response to user saline bolus request.
     MSG_ID_USER_CONFIRM_UF_SETTINGS_CHANGE = 0x15,                      ///< User confirmation of ultrafiltration settings change.
     MSG_ID_USER_TREATMENT_TIME_CHANGE_REQUEST = 0x16,                   ///< User request to change treatment duration.
+    MSG_ID_USER_BLOOD_DIAL_RATE_CHANGE_REQUEST = 0x17,                  ///< User request to change blood and dialysate rates.
+    MSG_ID_USER_BLOOD_DIAL_RATE_CHANGE_RESPONSE = 0x18,                 ///< HD response to user to change blood and dialysate rates.
+    MSG_ID_SET_DG_DIALYSATE_TEMP_TARGETS = 0x19,                        ///< HD provides DG with dialysate temperature set points.
 
     // service/test CAN messages
 
@@ -101,4 +104,23 @@
     END_OF_MSG_IDS                                                      ///< # of system message IDs.
 } MSG_ID_T;
 
+/// Settings change rejection reason codes.
+typedef enum Request_Reject_Reasons
+{
+    REQUEST_REJECT_REASON_NONE = 0,                                     ///< No reason.
+    REQUEST_REJECT_REASON_NOT_ALLOWED_IN_CURRENT_MODE,                  ///< Request is not allowed in the current operating mode.
+    REQUEST_REJECT_REASON_TIMEOUT_WAITING_FOR_USER_CONFIRM,             ///< Validated request was not confirmed by user in reasonable time.
+    REQUEST_REJECT_REASON_NOT_IN_TREATMENT_MODE,                        ///< Request is not allowed if not in treatment mode.
+    REQUEST_REJECT_REASON_INVALID_TREATMENT_STATE,                      ///< Request is not allowed in current treatment state.
+    REQUEST_REJECT_REASON_TREATMENT_TOO_CLOSE_TO_FINISHED,              ///< Request is not allowed so near end of treatment.
+    REQUEST_REJECT_REASON_TREATMENT_TIME_OUT_OF_RANGE,                  ///< Treatment duration is out of range.
+    REQUEST_REJECT_REASON_TREATMENT_TIME_LESS_THAN_CURRENT,             ///< Treatment time change is less than currently elapsed treatment time.
+    REQUEST_REJECT_REASON_BLOOD_FLOW_OUT_OF_RANGE,                      ///< Blood flow is out of range.
+    REQUEST_REJECT_REASON_DIAL_FLOW_OUT_OF_RANGE,                       ///< Dialysate flow is out of range.
+    REQUEST_REJECT_REASON_DIAL_VOLUME_OUT_OF_RANGE,                     ///< Dialysate flow rate or treatment duration causes dialysate volume to exceed limit.
+    REQUEST_REJECT_REASON_UF_VOLUME_OUT_OF_RANGE,                       ///< Ultrafiltration volume is out of range.
+    REQUEST_REJECT_REASON_UF_RATE_OUT_OF_RANGE,                         ///< Ultrafiltration rate is out of range.
+    NUM_OF_REQUEST_REJECT_REASONS                                       ///< Number of settings change reject codes.
+} REQUEST_REJECT_REASON_CODE_T;
+
 #endif