Hi Linda,

>I have a uniquenes constraint on my SQL Server table. I want to check for uniqueness in a rule before getting an error in SQL Server. I added a rule in the rule class. However, the SQL error is triggering before the rule code is ever run. Do I need to put this code in the HookPreSave method? I'd really like to keep all the rule stuff together, if possible. Thanks.

Seems to me you got it right by having the rule in the rule class. Are you calling your save at the form level or the business object? You added the rule and then placed the call to it in CheckRulesHook()?
Tim