I get this error every time when I am trying to set my combobox in the following manner:
cboGroups.Datasource = objGroupdDS.Tables("Groups"),
I get the above error. But my combobox still fills up. However it does not allow my panel to reflect the changes although they are there. Does anyone have an answer for this issue? Or is there a possible work around that I can use to get by this problem ......

Is the objGroupdDS dataset populated? Have you checked the row count in the table?

Also, what version of Visual Studio are you using? A lot has changed since the book that you are using was written?

Thearon