I'm really sorry to bother you with this stupid error, but I haven't been able to fix it.

I modified a table structure ( I added more fields ), but there was already a BO associated to that table, so I opened the BO Mapper, re-configured the existing BO and I could see all the fields (new and old), I rebuilt the partial, I went back to VS and checked the BO.designer.cs file and the code for the new fields was already there, next I created a maintenance form, dropped my BO, added textboxes, etc. and did the binding.

But when I debugged the solution I got an error that says: column X does not belong to table X, the exception was raised in the BO.designer.cs file in the field properties region.

Ok, if I change the fields binded to my textboxes and use the ones that already existed before the structure changes everything works fine, it only happens when I use the new added fields.

Maybe I'm skipping one o more steps when configuring the BO or something.

Again I'm so sorry to bother you with this, any help would be highly appreciated

Thanks in advance!!!!

The steps I use for this are:

1. Modify table structure
2. Open BOM, refresh the the BO and rebuild partial
3. Go back to VS and rebuild the project
4. Use new fields anywhere.

Some times you may need to clean up the solution (right click the solution and select cleanup) and also sometimes you may need to close VS and open it again.

Have you used the DDT to make the changes to your table? If so, have you deployed your changes to your database?

I made the structure changes using the SQL Server Management Studio Express.

Does the column(s) in question actually exist?  If not, there is your problem.  Otherwise, please post the full stack trace so that we can see where the error is originating.

Well, the fields were there and I followed the steps you mentioned, but in the end I decided to create a brand-new BO and forget about the one that already existed (too many problems).

Thank you very much for your replies!!!!