>Hi everybody,
>
>I'm wondering where should we handle possible errors - in the back-end in SP code or in the front end or in both?
>
>Which approach do you usually take?
>
>Thanks in advance.

If it is an execption the user should know about (underlying data has changed prior to update or duplicate key or something) then IMO the exception is best handled at the front end where you can give the user a clear message.

If an exception happens that does not affect what the user is trying to do, handle it at the server.