diff --git a/trytond/exceptions.py b/trytond/exceptions.py
index ff1a61ae30..1b05f7886e 100644
--- a/trytond/exceptions.py
+++ b/trytond/exceptions.py
@@ -26,13 +26,6 @@ class UserWarning(TrytonException):
         self.code = 2
 
 
-class NotLogged(TrytonException):
-
-    def __init__(self):
-        super(NotLogged, self).__init__('NotLogged')
-        self.code = 3
-
-
 class ConcurrencyException(TrytonException):
 
     def __init__(self, message):
diff --git a/trytond/protocols/dispatcher.py b/trytond/protocols/dispatcher.py
index 49528399ca..22459c50e7 100644
--- a/trytond/protocols/dispatcher.py
+++ b/trytond/protocols/dispatcher.py
@@ -16,8 +16,7 @@ from trytond.config import config
 from trytond import __version__
 from trytond.transaction import Transaction
 from trytond.cache import Cache
-from trytond.exceptions import UserError, UserWarning, NotLogged, \
-    ConcurrencyException
+from trytond.exceptions import UserError, UserWarning, ConcurrencyException
 from trytond.tools import is_instance_method
 from trytond.wsgi import app
 
@@ -212,7 +211,7 @@ def _dispatch(request, pool, *args, **kwargs):
                     transaction.rollback()
                     continue
                 raise
-            except (NotLogged, ConcurrencyException, UserError, UserWarning):
+            except (ConcurrencyException, UserError, UserWarning):
                 logger.debug(log_message, *log_args, exc_info=True)
                 raise
             except Exception: