Mario,

>I believe that MM tries to create the Pk during the FillDataSet on the following line of code, am I wrong?. However, at the end of the filldataset no PK is created on the underlying table.
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>
>// Specify that column and primary key information is added to the DataTable
> dbAdapter.MissingSchemaAction = MissingSchemaAction.AddWithKey;
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>

This is an ADO.NET feature that pulls the primary key information back from the database when issuing a SELECT command. If you examine the DataTable afterwards, does its PrimaryKey property contain anything?

Best Regards,