issue2550755: exceptions.NotFound(msg) msg is not reported to user in cgi fix tests Correct tests so they now expect NotFound exception rather than SeriousError. Renamed: test/test_cgi.py::FormTestCase::testCSVExportFailPermission to test/test_cgi.py::FormTestCase::testCSVExportFailPermissionBadColumn I think this test should return Unauthorised rather than NotFound. Discussion is on the issue. Also added a new test case to verify that exceptions.Unauthorised is raised if all columns are valid and the user is not allowed to access the class.