Index: sources/gui/qml/components/SliderCreateTreatment.qml
===================================================================
diff -u -rfcfa029b4a6d30ff8aa8162de7573545f3cf7052 -r82afc5332958148ccd96d32d2c6337ed6131a772
--- sources/gui/qml/components/SliderCreateTreatment.qml	(.../SliderCreateTreatment.qml)	(revision fcfa029b4a6d30ff8aa8162de7573545f3cf7052)
+++ sources/gui/qml/components/SliderCreateTreatment.qml	(.../SliderCreateTreatment.qml)	(revision 82afc5332958148ccd96d32d2c6337ed6131a772)
@@ -135,18 +135,31 @@
         anchors.left            : _slider.right
         anchors.leftMargin      : Variables.sliderAdjustButtonLeftMargin
 
+        // NOTE: @inActiveZero
+        // the slider which use inActiveZero are the once, with OFF button.
+        // these sliders have 0 as defalut to indicate OFF.
+        // when activated the first value they get is still the 0 ( OFF ).
+        // in that case we decrement once to get the correct minimum value.
+        // as example heparin dispensing after gets ON, firsrt decrement shows OFF ( 0 ).
+        // NOTE: if 0=defaultValue is in range (minimum < defaultValue < maximum), we still have problem, and needs more investigation
         onIncrementValue        : {
             if ( _slider.isActive) {
                 _slider.incrementValue(true)
             } else {
                 setActiveValid()
+                if ( inActiveZero ) { // NOTE: @inActiveZero
+                    _slider.decrementValue()
+                }
             }
         }
         onDecrementValue        : {
             if ( _slider.isActive) {
                 _slider.decrementValue(true)
             } else {
                 setActiveValid()
+                if ( inActiveZero ) { // NOTE: @inActiveZero
+                    _slider.decrementValue()
+                }
             }
         }
     }