diff --git a/bin/nova-manage b/bin/nova-manage
index c95b216c..db964064 100755
--- a/bin/nova-manage
+++ b/bin/nova-manage
@@ -522,8 +522,10 @@ class NetworkCommands(object):
                    [network_size=FLAG], [vlan_start=FLAG],
                    [vpn_start=FLAG], [fixed_range_v6=FLAG]"""
         if not fixed_range:
-            raise TypeError(_('Fixed range in the form of 10.0.0.0/8 is '
-                              'required to create networks.'))
+            msg = _('Fixed range in the form of 10.0.0.0/8 is '
+                    'required to create networks.')
+            print msg
+            raise TypeError(msg)
         if not num_networks:
             num_networks = FLAGS.num_networks
         if not network_size:
@@ -535,14 +537,18 @@ class NetworkCommands(object):
         if not fixed_range_v6:
             fixed_range_v6 = FLAGS.fixed_range_v6
         net_manager = utils.import_object(FLAGS.network_manager)
-        net_manager.create_networks(context.get_admin_context(),
-                                    cidr=fixed_range,
-                                    num_networks=int(num_networks),
-                                    network_size=int(network_size),
-                                    vlan_start=int(vlan_start),
-                                    vpn_start=int(vpn_start),
-                                    cidr_v6=fixed_range_v6,
-                                    label=label)
+        try:
+            net_manager.create_networks(context.get_admin_context(),
+                                        cidr=fixed_range,
+                                        num_networks=int(num_networks),
+                                        network_size=int(network_size),
+                                        vlan_start=int(vlan_start),
+                                        vpn_start=int(vpn_start),
+                                        cidr_v6=fixed_range_v6,
+                                        label=label)
+        except ValueError, e:
+            print e
+            raise e
 
     def list(self):
         """List all created networks"""