diff --git a/tiramisu_cmdline_parser/api.py b/tiramisu_cmdline_parser/api.py
index e62ccc9..32a7363 100644
--- a/tiramisu_cmdline_parser/api.py
+++ b/tiramisu_cmdline_parser/api.py
@@ -600,15 +600,17 @@ class TiramisuCmdlineParser(ArgumentParser):
                 else:
                     pass
             actions.setdefault(option.name(), []).append(kwargs)
+
         for option_is_not_default in options_is_not_default.values():
             self._option_is_not_default(**option_is_not_default)
         for values in actions.values():
             for value in values:
                 args, kwargs = value.get()
                 group.add_argument(*args, **kwargs)
-    def _valid_mandatory(self):
-        pass
 
+#    def _valid_mandatory(self):
+#        pass
+#
     def parse_args(self,
                    *args,
                    valid_mandatory=True,
@@ -617,7 +619,7 @@ class TiramisuCmdlineParser(ArgumentParser):
         try:
             namespaces = super().parse_args(*args, **kwargs)
         except PropertiesOptionError as err:
-            name = err._option_bag.option.impl_getname()
+            name = err._subconfig.path
             properties = self.config.option(name).property.get()
             if self.fullpath and 'positional' not in properties:
                 if len(name) == 1 and 'longargument' not in properties: