diff --git a/src/Mod/Material/MaterialEditor.py b/src/Mod/Material/MaterialEditor.py
index a058ac440e..c3db367b64 100644
--- a/src/Mod/Material/MaterialEditor.py
+++ b/src/Mod/Material/MaterialEditor.py
@@ -633,6 +633,7 @@ class MaterialsDelegate(QtGui.QStyledItemDelegate):
         Type = editor.property('Type')
         model = index.model()
         item = model.itemFromIndex(index)
+        print("item1={}".format(item.text()))
 
         if Type == "Color":
 
@@ -648,6 +649,7 @@ class MaterialsDelegate(QtGui.QStyledItemDelegate):
         else:
 
             super(MaterialsDelegate, self).setEditorData(editor, index)
+        print("item2={}".format(item.text()))
 
 
 ui = FreeCADGui.UiLoader()
diff --git a/src/Mod/Material/materialtools/cardutils.py b/src/Mod/Material/materialtools/cardutils.py
index 29afb305f9..2518bdc4e6 100644
--- a/src/Mod/Material/materialtools/cardutils.py
+++ b/src/Mod/Material/materialtools/cardutils.py
@@ -729,6 +729,15 @@ checkvalueunit('FractureToughness', '25')
 checkvalueunit('Density', '1 kg/m^3')
 checkvalueunit('Density', '0 kg/m^3')
 
+# syntax error in unit system, only the try: except in the checkvalueunit let it work
+checkvalueunit('ThermalConductivity', '0.02583 W/m/K')
+checkvalueunit('ThermalConductivity', '123abc456 W/m/K')
+checkvalueunit('ThermalConductivity', '25.83e−3 W/m/K')
+checkvalueunit('ThermalConductivity', '25.83e-3 W/m/K')
+from FreeCAD import Units
+Units.Quantity('25.83e−3 W/m/K')
+
+
 # test mat unit properties
 mat = {
     'Name': 'Concrete',