Hi Cathi,

I placed a breakpoint after the line of code you mentioned. dsOrders exists, however, I'm not seeing a property called DataAdapter. Am I looking on the wrong place?

I tested the session object as you suggested, and it works fine.
Just as the Session("OrderDataSet") command in the Page_Load method I added a line of code similar to what's found on page 317:
Session("ISBN") = "Test line"

In the btnUpdate_Click method I retrieved the line with:
Dim ISBN As String = Session("ISBN")
In the debugger just after this line of code, ISBN is set to "Test line"