BoundColumn is only used to determine ComboBox.Value. Since the latter
is not used in the code I wrote, it is not an issue for said code.

The line of code where you the got error works fine for me. Maybe you
got the error because you have not set the Combobox2.RowSource
property (you are populating Combobox2 in a different way). Try one of
these just before that line:

Debug.Print Combobox2.RowSource
MsgBox Combobox2.RowSource

I get Sheet1!A1:B25.

Hth,
Merjet