Index: sources/gui/qml/pages/MainStack.qml
===================================================================
diff -u -ra9b3b248a786b93bf6dfd8c29946d708d18dde9a -r9b628a1087942b7bee840ff9f01ee59f314cf943
--- sources/gui/qml/pages/MainStack.qml	(.../MainStack.qml)	(revision a9b3b248a786b93bf6dfd8c29946d708d18dde9a)
+++ sources/gui/qml/pages/MainStack.qml	(.../MainStack.qml)	(revision 9b628a1087942b7bee840ff9f01ee59f314cf943)
@@ -156,7 +156,7 @@
         function onStandbyWaitTreatmentChanged  ( vValue ) { /* It depends on the subModes of the standBy. Handled by onHome.  */   }
         function onStandbyWaitDisinfectChanged  ( vValue ) { page( _disinfectStack                  , vValue    )}
 
-        function onValidateParametersChanged    ( vValue ) {       _preTreatmentCreateStack         . clear    ()
+        function onValidateParametersChanged    ( vValue ) {       _preTreatmentCreateStack.clear   ( vValue    ) // vValue == true if enterig the state ( clear only on entering).
                                                              page( _preTreatmentCreateStack         , vValue    )}
         function onPreTreatmentChanged          ( vValue ) { page( _preTreatmentStack               , vValue    )}
         function onInTreatmentChanged           ( vValue ) { page( _treatmentStack                  , vValue    )}