/// <summary>
/// SMA_PK
[Browsable(
BusinessFieldDisplayInEditor(),
Description(
DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
{
}
In the Database Table, the Field SMA_PK is set up as Int
Also, as the error is only happening when I try to 'Add',the question of whether it is Null should not arise ?