Index: firmware/App/Modes/ModePreTreat.c
===================================================================
diff -u -r838df450f09668adbd73e61fadbff8c81fe7926e -r6419179374edcd65da462de84e8aeaefb7e20320
--- firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision 838df450f09668adbd73e61fadbff8c81fe7926e)
+++ firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision 6419179374edcd65da462de84e8aeaefb7e20320)
@@ -161,6 +161,13 @@
 *************************************************************************/
 U32 execPreTreatmentMode( void )
 {
+    BOOL stop = isStopButtonPressed();
+
+    if ( TRUE == stop )
+    {
+        activateAlarmNoData( ALARM_ID_TREATMENT_STOPPED_BY_USER );
+    }
+
     // execute mode state machine
     switch ( currentPreTreatmentState )
     {
@@ -598,7 +605,8 @@
  * @brief
  * The handleInstallState function handles disposable installation.
  * @details Inputs: none
- * @details Outputs: transition to prime sub-mode when blood pump finished homing
+ * @details Outputs: transition to prime sub-mode when blood pump finished
+ * homing
  * @return current state (sub-mode)
  *************************************************************************/
 static HD_PRE_TREATMENT_MODE_STATE_T handleInstallState( void )
@@ -656,7 +664,8 @@
 
 /*********************************************************************//**
  * @brief
- * The handlePrimeState function handles priming the blood and dialysate circuits.
+ * The handlePrimeState function handles priming the blood and dialysate
+ * circuits.
  * @details Inputs: none
  * @details Outputs: transition to self test wet state after priming passed
  * @return current state (sub-mode)