Isabelle,

OK, it figures that as soon as I declare something working ... it
stops working.

When I run the macro, I get the following error:

Run-time error '1004'

Application-defined or object defined error

When I click on the Debug button, the Visual Basic editor
highlights the following line:

y =
Application.Substitute(x, .Range("Current_Function"), .Range("Selected_Function"))

Any ideas ?

- Ronald K.