Index: firmware/App/Modes/ModeTreatmentParams.c
===================================================================
diff -u -r0a4dcd288d4347b85baaa0b07da568b6add5eac7 -r82b7c4c94b0f8b3f8a3d3d2e41384a7a7d497215
--- firmware/App/Modes/ModeTreatmentParams.c	(.../ModeTreatmentParams.c)	(revision 0a4dcd288d4347b85baaa0b07da568b6add5eac7)
+++ firmware/App/Modes/ModeTreatmentParams.c	(.../ModeTreatmentParams.c)	(revision 82b7c4c94b0f8b3f8a3d3d2e41384a7a7d497215)
@@ -276,6 +276,7 @@
  *************************************************************************/
 U32 execTreatParamsMode( void )
 {
+    HD_TREATMENT_PARAMS_MODE_STATE_T priorSubState = currentTreatmentParamsState;
     BOOL stop = isStopButtonPressed();
 
     if ( TRUE == stop )
@@ -304,6 +305,11 @@
 
     }
 
+    if ( priorSubState != currentTreatmentParamsState )
+    {
+        SEND_EVENT_WITH_2_U32_DATA( HD_EVENT_SUB_STATE_CHANGE, priorSubState, currentTreatmentParamsState );
+    }
+
     return (U32)currentTreatmentParamsState;
 }