Index: MsgDefs.h
===================================================================
diff -u -r03cc72d18faff84b320ab9675efd6fa5e9a36ce0 -r4a08b0816b48374da2c87dbe7d6d51e08ef6b81f
--- MsgDefs.h	(.../MsgDefs.h)	(revision 03cc72d18faff84b320ab9675efd6fa5e9a36ce0)
+++ MsgDefs.h	(.../MsgDefs.h)	(revision 4a08b0816b48374da2c87dbe7d6d51e08ef6b81f)
@@ -69,6 +69,9 @@
     MSG_ID_DG_HEATERS_DATA = 0x2C,                                      ///< DG broadcast of the heaters data
     MSG_ID_DG_TEMPERATURE_DATA = 0x2D,                                  ///< DG broadcast of the temperature sensors data
     MSG_ID_USER_UF_SETTINGS_CHANGE_CONFIRMATION_RESPONSE = 0x2E,        ///< HD response to user selection of ultrafiltration settings change option selection.
+#ifdef EMC_TEST_BUILD
+    MSG_ID_CAN_ERROR_COUNT = 0x999,  // test code in support of EMC testing
+#endif
 
     // service/test CAN messages
     MSG_ID_FIRST_TESTER_MESSAGE = 0x8000,                               ///< First HD test message ID.