diff --git a/frontends/src/primitivus/profile_manager.py b/frontends/src/primitivus/profile_manager.py
index 2e8ebee1..7f4de090 100644
--- a/frontends/src/primitivus/profile_manager.py
+++ b/frontends/src/primitivus/profile_manager.py
@@ -77,11 +77,11 @@ class ProfileManager(urwid.WidgetWrap):
 
     def _profileCreationFailure(self, reason):
         self.host.removePopUp()
-        if reason=="CONFLICT":
+        if reason=="ConflictError":
             message=_("A profile with this name already exists")
-        elif reason=="CANCELED":
+        elif reason=="CancelError":
             message=_("Profile creation cancelled by backend")
-        elif reason=="DATABASE":
+        elif reason=="DATABASE": # FIXME: doesn't seem to exist !
             message=_("Database error")
         else:
             message=_("Unknown reason (%s)") % reason
diff --git a/src/bridge/DBus.py b/src/bridge/DBus.py
index e7745ef6..a9779915 100755
--- a/src/bridge/DBus.py
+++ b/src/bridge/DBus.py
@@ -56,8 +56,13 @@ class DeferredNotAsync(dbus.DBusException):
 class GenericException(dbus.DBusException):
     def __init__(self, twisted_error):
         super(GenericException, self).__init__()
-        mess = twisted_error.getErrorMessage()
-        self._dbus_error_name = const_ERROR_PREFIX + "." + (mess or str(twisted_error.__class__))
+        try:
+            error_name = str(twisted_error.value().__class__.__name__)
+            # twisted_error.value is a class
+        except TypeError:
+            # twisted_error.value is an instance
+            error_name = str(twisted_error.value.__class__.__name__)
+        self._dbus_error_name = const_ERROR_PREFIX + "." + error_name
 
 
 class DbusObject(dbus.service.Object):
diff --git a/src/bridge/bridge_constructor/dbus_core_template.py b/src/bridge/bridge_constructor/dbus_core_template.py
index e5aa2c44..b7776c8b 100644
--- a/src/bridge/bridge_constructor/dbus_core_template.py
+++ b/src/bridge/bridge_constructor/dbus_core_template.py
@@ -56,8 +56,13 @@ class DeferredNotAsync(dbus.DBusException):
 class GenericException(dbus.DBusException):
     def __init__(self, twisted_error):
         super(GenericException, self).__init__()
-        mess = twisted_error.getErrorMessage()
-        self._dbus_error_name = const_ERROR_PREFIX + "." + (mess or str(twisted_error.__class__))
+        try:
+            error_name = str(twisted_error.value().__class__.__name__)
+            # twisted_error.value is a class
+        except TypeError:
+            # twisted_error.value is an instance
+            error_name = str(twisted_error.value.__class__.__name__)
+        self._dbus_error_name = const_ERROR_PREFIX + "." + error_name
 
 
 class DbusObject(dbus.service.Object):
diff --git a/src/core/exceptions.py b/src/core/exceptions.py
index d2881192..9b86484f 100644
--- a/src/core/exceptions.py
+++ b/src/core/exceptions.py
@@ -57,6 +57,18 @@ class DataError(Exception):
     pass
 
 
+class ConflictError(Exception):
+    pass
+
+
+class CancelError(Exception):
+    pass
+
+
+class InternalError(Exception):
+    pass
+
+
 class BridgeInitError(Exception):
     pass
 
diff --git a/src/memory/memory.py b/src/memory/memory.py
index d8a90b0a..2d50c3ed 100644
--- a/src/memory/memory.py
+++ b/src/memory/memory.py
@@ -164,9 +164,9 @@ class Params(object):
         """
         if self.storage.hasProfile(profile):
             info(_('The profile name already exists'))
-            return defer.fail(Failure(u"CONFLICT"))
+            return defer.fail(Failure(exceptions.ConflictError))
         if not self.host.trigger.point("ProfileCreation", profile):
-            return defer.fail(Failure(u"CANCEL"))
+            return defer.fail(Failure(exceptions.CancelError))
         return self.storage.createProfile(profile)
 
     def deleteProfile(self, profile):
diff --git a/src/plugins/plugin_misc_account.py b/src/plugins/plugin_misc_account.py
index 74cdc02e..40b9d0e9 100755
--- a/src/plugins/plugin_misc_account.py
+++ b/src/plugins/plugin_misc_account.py
@@ -79,7 +79,7 @@ class ProsodyRegisterProtocol(protocol.ProcessProtocol):
             self.deferred.callback(None)
         else:
             error(_(u"Can't register Prosody account (error code: %(code)d): %(message)s") % {'code': reason.value.exitCode, 'message': self.data})
-            self.deferred.errback(Failure(u"INTERNAL"))
+            self.deferred.errback(Failure(exceptions.InternalError))
 
 
 class MiscAccount(object):
@@ -118,7 +118,7 @@ class MiscAccount(object):
             raise exceptions.DataError
 
         if profile.lower() in self.getConfig('reserved_list'):
-            return defer.fail(Failure(u'CONFLICT'))
+            return defer.fail(Failure(exceptions.ConflictError))
 
         d = self.host.memory.asyncCreateProfile(profile)
         d.addCallback(self._profileRegistered, email, password, profile)