I've created a dataset that includes a tableadapter and table for
countries. Here is the table schema

CREATE TABLE [CAT].[Countries](
    [CountryID] [smallint] IDENTITY(1,1) NOT NULL,
    [RegionID] [smallint] NOT NULL,
    [CountryCode] [varchar](12) NULL,
    [CountryName] [nvarchar](100) NOT NULL,
    [Recognized] [bit] NOT NULL CONSTRAINT [DF_Country_Recognized]
DEFAULT ((1))
) ON [PRIMARY]

GO
SET ANSI_PADDING OFF
GO
ALTER TABLE [CAT].[Countries]  WITH CHECK ADD  CONSTRAINT
[FK_Countries_to_Regions_by_RegionID] FOREIGN KEY([RegionID])
REFERENCES [CAT].[Regions] ([RegionID])
GO
ALTER TABLE [CAT].[Countries] CHECK CONSTRAINT
[FK_Countries_to_Regions_by_RegionID]

The contents of the table is 251 rows.

The contents of the table are retrieved via a stored procedure --

USE [FCAST]
GO
/****** Object:  StoredProcedure [CAT].[usp_select_countries]
Script Date: 01/28/2008 17:22:30 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================

-- Create date:
-- Description:
-- =============================================
CREATE PROCEDURE [CAT].[usp_select_countries]
    -- Add the parameters for the stored procedure here
AS
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;

   -- Insert statements for procedure here
    SELECT [CountryID]
         ,[RegionID]
         ,[CountryCode]
         ,[CountryName]
         ,[Recognized]
    FROM CAT.[Countries]
    ORDER BY CountryName ASC
END

When I attempt to set the datasource of a combo box in the following
manner

combobox.datasource = adapter.getdata where adapter is a tableadapter
for the country table

I get the following error {"Failed to enable constraints. One or more
rows contain values violating non-null, unique, or foreign-key
constraints."}

I've checked the table -- no primary key violations or null exceptions
that I can see -- I even change the stored procedure so that it just
returns the first five rows just to prove to myself I'm not crazy and
I still get this same   error! What's funny is that this code worked
for the last few months -- this morning I had to rebuild part of the
dataset (because of surprise, surprise, another stupid MicroCrap
error) and suddenly this I get this error on this one table.

Can anyone help ? I am beyond frustrated.

Thanks,