Index: HDDefs.h
===================================================================
diff -u -r50c53c3f937ecc41b31fad109d80eb6ea827ab32 -rf8edda8e547c2105b19d2dc50ade1dbcaf94515f
--- HDDefs.h	(.../HDDefs.h)	(revision 50c53c3f937ecc41b31fad109d80eb6ea827ab32)
+++ HDDefs.h	(.../HDDefs.h)	(revision f8edda8e547c2105b19d2dc50ade1dbcaf94515f)
@@ -753,6 +753,7 @@
     HD_EVENT_RSRVR_1_LOAD_CELL_END_VALUES,                              ///< HD reservoir 2 load cells end values
     HD_EVENT_RSRVR_2_LOAD_CELL_START_VALUES,                            ///< HD reservoir 2 load cells start values
     HD_EVENT_RSRVR_2_LOAD_CELL_END_VALUES,                              ///< HD reservoir 2 load cells end values
+    HD_EVENT_SUB_STATE_CHANGE,                                          ///< HD Op sub-state change event
     NUM_OF_EVENT_IDS                                                    ///< Total number of HD events
 };
 typedef enum HD_Event_List HD_EVENT_ID_T;                               ///< Type for HD event list enumeration