Index: MsgDefs.h
===================================================================
diff -u -r2fed9c20cb5fcb11871abf2e496b82bdaae92561 -r5ddd2c7c86261910d755ea1b17611d4f3023b3d0
--- MsgDefs.h	(.../MsgDefs.h)	(revision 2fed9c20cb5fcb11871abf2e496b82bdaae92561)
+++ MsgDefs.h	(.../MsgDefs.h)	(revision 5ddd2c7c86261910d755ea1b17611d4f3023b3d0)
@@ -8,8 +8,8 @@
 *
 * @file    MsgDefs.h
 *
-* @author  (last)      Praneeth Bunne
-* @date    (last)      31-Jul-2026
+* @author  (last)      Varshini Nagabooshanam
+* @date    (last)      19-Aug-2026
 *
 * @author  (original)  Sean Nash
 * @date    (original)  01-Aug-2024
@@ -205,7 +205,7 @@
     MSG_ID_TD_TREATMENT_LOG_AVERAGE_DATA = 0xAD,                                    ///< TD broadcast of treatment log average data
     MSG_ID_TD_DRY_SELF_TEST_PROGRESS_DATA = 0xAE,                                   ///< TD dry self test progress data
     MSG_ID_TD_TUBE_SET_AUTHENTICATION_REQUEST = 0xAF,                               ///< UI tube set authentication acknowledge request
-    MSG_ID_TD_TUBE_SET_AUTHENTICATION_ACK_RESPONSE = 0xB0,                          ///< TD tube set authentication acknowledge response
+    MSG_ID_UI_TUBE_SET_AUTHENTICATION_ACK_RESPONSE = 0xB0,                          ///< TD tube set authentication acknowledge response
     MSG_ID_TD_SYRINGE_PUMP_DATA = 0xB1,                                             ///< TD broadcast of syringe pump data
     MSG_ID_TD_HEPARIN_PAUSE_RESUME_RESPONSE= 0xB2,                                  ///< TD response to pause/resume Heparin delivery request
     MSG_ID_FFU_SIGNAL_TD_UPDATE_AVAILABLE = 0xB3,                                   ///< FFU signal TD update is available.
@@ -266,6 +266,8 @@
     MSG_ID_DD_NVM_SET_CAL_BICARB_CONCENTRATE_RESPONSE = 0x126,                       ///< DD NVM Set Bicarbonate Concentrate Calibration Record Response
     MSG_ID_DD_NVM_SET_CAL_ACCEL_SENSOR_RESPONSE = 0x127,                             ///< DD NVM Set Accelerometer Sensor Calibration Record Response.
     MSG_ID_DD_NVM_SET_CAL_BLOOD_LEAK_SENSOR_RESPONSE = 0x128,                        ///< DD NVM Set Blood Leak Sensor Calibration Record Response.
+    MSG_ID_TD_DD_REQUEST_SERVICE_RECORD_FROM_TD = 0x129,                             ///< TD request for DD service record information.
+    MSG_ID_TD_DD_USAGE_INFO_REQUEST = 0x12A,                                         ///< TD request for DD usage information.
 
     // service/test CAN messages
     MSG_ID_FIRST_TD_TESTER_MESSAGE = 0x8000,                                        ///< First TD test message ID
@@ -641,6 +643,11 @@
     REQUEST_REJECT_REASON_NVM_JOB_QUEUE_BUSY = 62,                                  ///< NVM Job queue is busy sending other records.
     REQUEST_REJECT_REASON_NVM_INVALID_CRC = 63,                                     ///< NVM received CRC of the record is invalid
     REQUEST_REJECT_REASON_NVM_INVALID_OPERATION_MODE = 64,                          ///< NVM Operation Mode is not Service mode.
+    REQUEST_REJECT_REASON_FP_BUSY = 65,                                             ///< Treatment cannot initiate if FP is busy
+    REQUEST_REJECT_REASON_FP_SERVICE_IS_DUE = 66,                                   ///< FP service is due
+    REQUEST_REJECT_REASON_DD_TEMPERATURE_OUT_OF_RANGE = 67,                         ///< DD temperature too high
+    REQUEST_REJECT_REASON_DD_BUSY = 68,                                             ///< Treatment cannot initiate if DD is busy
+    REQUEST_REJECT_REASON_REQUEST_ALREADY_PENDING = 69,                             ///< Reject if a treatment start request is already pending.
     NUM_OF_REQUEST_REJECT_REASONS                                                   ///< Number of settings change reject codes
 };
 typedef enum Request_Reject_Reasons REQUEST_REJECT_REASON_CODE_T;                   ///< Type for settings change rejection reason codes enumeration