Index: sources/gui/qml/pages/MainStack.qml
===================================================================
diff -u -r9b99693be1aaf7306272f37e614b52c7085bcf44 -rcadc67bc540fdf1f1e003c55fcf29a92e6686d89
--- sources/gui/qml/pages/MainStack.qml	(.../MainStack.qml)	(revision 9b99693be1aaf7306272f37e614b52c7085bcf44)
+++ sources/gui/qml/pages/MainStack.qml	(.../MainStack.qml)	(revision cadc67bc540fdf1f1e003c55fcf29a92e6686d89)
@@ -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    )}