Index: sources/gui/qml/pages/treatment/adjustments/TreatmentAdjustmentPressuresLimits.qml
===================================================================
diff -u -rbea36be2766046e63c4e82539a630b5cee7ce1c6 -r9c2a4c5abe3a93c3b3a7ed3d6fd9e12f0c161b3c
--- sources/gui/qml/pages/treatment/adjustments/TreatmentAdjustmentPressuresLimits.qml	(.../TreatmentAdjustmentPressuresLimits.qml)	(revision bea36be2766046e63c4e82539a630b5cee7ce1c6)
+++ sources/gui/qml/pages/treatment/adjustments/TreatmentAdjustmentPressuresLimits.qml	(.../TreatmentAdjustmentPressuresLimits.qml)	(revision 9c2a4c5abe3a93c3b3a7ed3d6fd9e12f0c161b3c)
@@ -35,6 +35,11 @@
     readonly property alias venousPressureLimitAsymtrc  : _venousAsymmetricWindow.value
     readonly property alias tmpLimitWindow              : _tmpWindow.value
 
+    readonly property bool isValid                      : _arterialWindow.valid         &&
+                                                          _venousWindow.valid           &&
+                                                          _venousAsymmetricWindow.valid &&
+                                                          _tmpWindow.valid
+
     titleText: qsTr("Pressure Window Limit Settings")
     height              : Variables.smallDialogHeight
     width               : Variables.smallDialogWidth
@@ -79,8 +84,12 @@
                     minimum             : vTreatmentPressureOcclusion.arterialMin
                     maximum             : vTreatmentPressureOcclusion.arterialMax
                     step                : vTreatmentRanges.arterialPressureLimitWindowRes
+                    valid               : ! vTreatmentAdjustmentPressuresLimits.arterialPressureLimitWindowRejectionReason
 
-                    onDidChange         : function(vValue) { value = vValue }
+                    onDidChange         : function(vValue) {
+                        if ( ! _arterialWindow.valid ) { vTreatmentAdjustmentPressuresLimits.arterialPressureLimitWindowRejectionReason = Variables.noRejectReason }
+                        value = vValue
+                    }
                 }
 
                 LabelUnitValueAdjuster { id: _venousWindow
@@ -93,8 +102,12 @@
                     minimum             : vTreatmentPressureOcclusion.venousMin
                     maximum             : vTreatmentPressureOcclusion.venousMax
                     step                : vTreatmentRanges.venousPressureLimitWindowRes
+                    valid               : ! vTreatmentAdjustmentPressuresLimits.venousPressureLimitWindowRejectionReason
 
-                    onDidChange         : function(vValue) { value = vValue }
+                    onDidChange         : function(vValue) {
+                        if ( ! _venousWindow.valid ) { vTreatmentAdjustmentPressuresLimits.venousPressureLimitWindowRejectionReason = Variables.noRejectReason }
+                        value = vValue
+                    }
                 }
 
                 LabelUnitValueAdjuster { id: _venousAsymmetricWindow
@@ -107,8 +120,12 @@
                     minimum             : vTreatmentRanges.venousPressureLimitAsymtrcMin
                     maximum             : vTreatmentRanges.venousPressureLimitAsymtrcMax
                     step                : vTreatmentRanges.venousPressureLimitAsymtrcRes
+                    valid               : ! vTreatmentAdjustmentPressuresLimits.venousPressureLimitAsymtrcRejectionReason
 
-                    onDidChange         : function(vValue) { value = vValue }
+                    onDidChange         : function(vValue) {
+                        if ( ! _venousAsymmetricWindow.valid ) { vTreatmentAdjustmentPressuresLimits.venousPressureLimitAsymtrcRejectionReason = Variables.noRejectReason }
+                        value = vValue
+                    }
                 }
 
                 LabelUnitValueAdjuster { id: _tmpWindow
@@ -121,8 +138,12 @@
                     minimum             : vTreatmentPressureOcclusion.tmpMin
                     maximum             : vTreatmentPressureOcclusion.tmpMax
                     step                : vTreatmentRanges.transmembranePressureLimitWindowRes
+                    valid               : ! vTreatmentAdjustmentPressuresLimits.tmpPressureLimitWindowRejectionReason
 
-                    onDidChange         : function(vValue) { value = vValue }
+                    onDidChange         : function(vValue) {
+                        if ( ! _tmpWindow.valid ) { vTreatmentAdjustmentPressuresLimits.tmpPressureLimitWindowRejectionReason = Variables.noRejectReason }
+                        value = vValue
+                    }
                 }
             }
         }
@@ -141,6 +162,7 @@
                 font.weight : Font.Medium
             }
             isDefault   : true
+            enabled     : _root.isValid
 
             onClicked   : {
                 _root.confirmClicked()