Index: MsgDefs.h
===================================================================
diff -u -r35f81d848a7983f7272feab7bce35fb0be2d88d0 -r2c03ecc967a424278fb06876eddb7ae0c2e171dc
--- MsgDefs.h	(.../MsgDefs.h)	(revision 35f81d848a7983f7272feab7bce35fb0be2d88d0)
+++ MsgDefs.h	(.../MsgDefs.h)	(revision 2c03ecc967a424278fb06876eddb7ae0c2e171dc)
@@ -9,7 +9,7 @@
 * @file    MsgDefs.h
 *
 * @author  (last)      Dara Navaei
-* @date    (last)      03-Jan-2023
+* @date    (last)      11-Jan-2023
 *
 * @author  (original)  Sean
 * @date    (original)  27-Feb-2020
@@ -535,6 +535,7 @@
     REQUEST_REJECT_REASON_HD_SERVICE_IS_DUE = 48,                       ///< HD service is due
     REQUEST_REJECT_REASON_DG_CHEM_FLUSH_NOT_COMPLETED = 49,             ///< DG chemical flush is not complete
     REQUEST_REJECT_REASON_DG_RO_FILTER_TEMPERATURE_OUT_OF_RANGE = 50,   ///< DG RO filter temperature out of range
+    REQUEST_REJECT_REASON_DG_INCOMPATIBLE = 51,                         ///< DG firmware version is not compatible with HD firmware
     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