diff --git a/tiramisu/config.py b/tiramisu/config.py
index b6b5b46..7218b94 100644
--- a/tiramisu/config.py
+++ b/tiramisu/config.py
@@ -220,7 +220,7 @@ class Config(object):
     def _is_empty(self, opt):
         if (not opt.is_multi() and self._cfgimpl_values[opt._name] == None) or \
             (opt.is_multi() and (self._cfgimpl_values[opt._name] == [] or \
-                None in self._cfgimpl_values[name])):
+                None in self._cfgimpl_values[opt._name])):
             return True
         return False
 
@@ -284,12 +284,6 @@ class Config(object):
             homeconfig = self._cfgimpl_get_toplevel()
             mandatory = homeconfig._cfgimpl_mandatory
             if opt_or_descr.is_mandatory() and mandatory:
-                if name == 'ip_ssh_eth0':
-                    print "c'est bien une mandataire2"
-                    print self._cfgimpl_values[name]
-                    print self._is_empty(opt_or_descr)
-                    print type(opt_or_descr)
-                    print opt_or_descr.is_empty_by_default()
                 if self._is_empty(opt_or_descr) and \
                         opt_or_descr.is_empty_by_default():
                     raise MandatoryError("option: {0} is mandatory "