Are you calling Update on the dataset like this without specifying the name of the table that you are updating? The problem is that when table names are not given, the system the table is named Table. This, of course, causes the update to fail if the table has a different name. For example, if the table is named Customers, then change this line

dataAdapter.Update( dataset );

to this line

dataAdapter.Update( dataset, "Customers" );

George Shepherd, Syncfusion, and Stuart Celarier, Fern Creek