Linda,

>I understand what you're saying but I don't see how to apply it. I'm not passing any parameters in any of my code. Shouldn't the business object entity handle the data typing for bound objects? I'm using the default web business form save method, passing a dataset that has all the values to update the table. It looks like when the mmBusinessObject.SaveDataSet method checks for the primary key, if RetrieveAutoIncrement is false, the primary key is always set to null. Do I need to write an override method for this?

Gotcha...are you getting this error with all DataSets you are saving or just this one? If it's just this one, I recommend trying to create a custom data access class (as described in the MM .NET Dev Guide) to see if that fixes the problem.

Best Regards,