Index: firmware/App/Modes/ModeTreatmentParams.c
===================================================================
diff -u -rb0b3522f2bd0b5b20ecbfd53c8f55b0e646ffa11 -r101bf85b0b425e919b01b4b7fabcbd15fd5bbde5
--- firmware/App/Modes/ModeTreatmentParams.c	(.../ModeTreatmentParams.c)	(revision b0b3522f2bd0b5b20ecbfd53c8f55b0e646ffa11)
+++ firmware/App/Modes/ModeTreatmentParams.c	(.../ModeTreatmentParams.c)	(revision 101bf85b0b425e919b01b4b7fabcbd15fd5bbde5)
@@ -206,6 +206,7 @@
         treatmentCancelled = TRUE;
         result = TRUE;
     }
+    sendTreatmentStartResponseMsg( result, 0 ); // TODO - provide reason code if rejected
 
     return result;
 }
@@ -239,7 +240,7 @@
             break;
 
         default:
-            // TODO - s/w fault
+            SET_ALARM_WITH_2_U32_DATA( ALARM_ID_HD_SOFTWARE_FAULT, SW_FAULT_ID_MODE_TREATMENT_PARAMS_INVALID_STATE, (U32)currentTreatmentParamsState )
             break;
 
     }
@@ -347,7 +348,7 @@
  *************************************************************************/
 BOOL validateAndSetTreatmentParameters( TREATMENT_PARAMS_DATA_PAYLOAD_T params )
 {
-    BOOL paramsAreValid = FALSE;
+    BOOL paramsAreInvalid = TRUE;
     BOOL paramsAreInRange, paramsAreConsistent;
     U32 rejReasons[ NUM_OF_TREATMENT_PARAMS ];
 
@@ -363,14 +364,14 @@
     // determine overall validity of received treatment parameters
     if ( ( TRUE == paramsAreInRange ) && ( TRUE == paramsAreConsistent ) )
     {
-        paramsAreValid = TRUE;
+        paramsAreInvalid = FALSE;
         validTreatParamsReceived = TRUE;
     }
 
     // respond to set treatment parameters request message
-    sendTreatmentParamsResponse( paramsAreValid, &rejReasons[0] );
+    sendTreatmentParamsResponse( paramsAreInvalid, &rejReasons[0] );
 
-    return paramsAreValid;
+    return !paramsAreInvalid;
 }
 
 /*********************************************************************//**