fix #4572

src/Mod/Path/PathScripts/PathPropertyBag.py

@@ -67,6 +67,18 @@ def __getstate__(self):
     def __setstate__(self, state):
         return None
 
+    def __sanitizePropertyName(self, name):
+        if(len(name) == 0):
+            return
+        clean = name[0].lower()
+        for i in range(1, len(name)):
+            if (name[i] == ' '):
+                clean += name[i + 1].upper()
+                i += 1
+            elif(name[i - 1] != ' '):
+                clean += name[i]
+        return clean
+
     def onDocumentRestored(self, obj):
         self.obj = obj
         obj.setEditorMode(self.CustomPropertyGroups, 2)  # hide
@@ -82,10 +94,14 @@ def addCustomProperty(self, propertyType, name, group=None, desc=None):
         if group is None:
             group = self.CustomPropertyGroupDefault
         groups = self.obj.CustomPropertyGroups
+
+        name = self.__sanitizePropertyName(name)
+
         if not group in groups:
             groups.append(group)
             self.obj.CustomPropertyGroups = groups
         self.obj.addProperty(propertyType, name, group, desc)
+        return name
 
     def refreshCustomPropertyGroups(self):
         '''refreshCustomPropertyGroups() ... removes empty property groups, should be called after deleting properties.'''

src/Mod/Path/PathScripts/PathPropertyBagGui.py

@@ -299,10 +299,10 @@ def addCustomProperty(self, obj, dialog):
         typ  = dialog.propertyType()
         grp  = dialog.propertyGroup()
         info = dialog.propertyInfo()
-        self.obj.Proxy.addCustomProperty(typ, name, grp, info)
+        propname = self.obj.Proxy.addCustomProperty(typ, name, grp, info)
         if dialog.propertyIsEnumeration():
             setattr(self.obj, name, dialog.propertyEnumerations())
-        return (name, info)
+        return (propname, info)
 
     def propertyAdd(self):
         PathLog.track()