diff --git a/_50_mistral.py.example b/_50_mistral.py.example
index f99a3ca..2eba392 100644
--- a/_50_mistral.py.example
+++ b/_50_mistral.py.example
@@ -1,4 +1,11 @@
+from mistraldashboard import exceptions
+
 DASHBOARD = 'mistral'
 ADD_INSTALLED_APPS = ['mistraldashboard']
 DEFAULT = True
-ADD_EXCEPTIONS = {}
+
+ADD_EXCEPTIONS = {
+    'recoverable': exceptions.RECOVERABLE,
+    'not_found': exceptions.NOT_FOUND,
+    'unauthorized': exceptions.UNAUTHORIZED,
+}
diff --git a/mistraldashboard/exceptions.py b/mistraldashboard/exceptions.py
new file mode 100644
index 0000000..e69a365
--- /dev/null
+++ b/mistraldashboard/exceptions.py
@@ -0,0 +1,20 @@
+# Copyright 2015 Huawei Technologies Co., Ltd.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from mistralclient.api.base import APIException
+from openstack_dashboard import exceptions
+
+NOT_FOUND = exceptions.NOT_FOUND
+RECOVERABLE = exceptions.RECOVERABLE + (APIException,)
+UNAUTHORIZED = exceptions.UNAUTHORIZED