Index: sources/gui/qml/pages/pretreatment/create/PreTreatmentCreateTreatmentSettings.qml
===================================================================
diff -u -r121abe6b9a78f12d3c0cce76ca3eb618084409b3 -r4d88a605fb89311e67652a0fdeee2b44471a6223
--- sources/gui/qml/pages/pretreatment/create/PreTreatmentCreateTreatmentSettings.qml	(.../PreTreatmentCreateTreatmentSettings.qml)	(revision 121abe6b9a78f12d3c0cce76ca3eb618084409b3)
+++ sources/gui/qml/pages/pretreatment/create/PreTreatmentCreateTreatmentSettings.qml	(.../PreTreatmentCreateTreatmentSettings.qml)	(revision 4d88a605fb89311e67652a0fdeee2b44471a6223)
@@ -181,7 +181,7 @@
 
             onDidActiveChange   : function(vState) {  vTreatmentCreate.substitutionFluidVolumeSet = vState }
             onDidChange         : function(vValue) {
-                if ( ! _ufVolume.valid ) { vTreatmentCreate.substitutionFluidVolumeRejectReason = Variables.noRejectReason }
+                if ( ! _subFluidVolume.valid ) { vTreatmentCreate.substitutionFluidVolumeRejectReason = Variables.noRejectReason }
                 vTreatmentCreate.substitutionFluidVolume = vValue
             }
             Behavior on height  { NumberAnimation   { duration: 250 } }