>Michel, in one of my forms I work with 3 instances of the same table open with different aliases in DE, I do this in DE BeforeOpenTables, (or DE Init()) like
>this.Cursor3.CursorSource="myTable.dbf".
>(In my case it is a little more complicated, because I add function to define path to currently selected company data files).

Have you tried using the visual interface of DE to add 3 tables? This is where it doesn't open additional instance of the same table.