This video will cover what you have to do after upgrading to DNN 7.1 so you can get the new "404 page not found" page. This is part 2 of 2.
1 - Script to find the [TABID]:
Select * From Tabs Order By TabID Desc
2 - Script to create the 404 Error configuration:
INSERT INTO PortalSettings(
PortalID,
SettingName,
SettingValue,
CreatedByUserID,
CreatedOnDate,
LastModifiedByUserID,
LastModifiedOnDate,
CultureCode)
values
(
[SITEID],
'AUM_ErrorPage404',
'[TABID]',
-1,
GetDate(),
-1,
GetDate(),
'en-us')