I'm trying to add the following names to a workbook:

ActiveWorkbook.Names.Add Name:="A03_01", RefersToR1C1:=...
ActiveWorkbook.Names.Add Name:="B03_01", RefersToR1C1:=...
ActiveWorkbook.Names.Add Name:="C03_01", RefersToR1C1:=...
ActiveWorkbook.Names.Add Name:="D03_01", RefersToR1C1:=...
ActiveWorkbook.Names.Add Name:="E03_01", RefersToR1C1:=...

BUT!

Number 3:

ActiveWorkbook.Names.Add Name:="C03_01", RefersToR1C1:=...

Fails, with a message, saying that the name is invalid?!?

Why is "C03_01" invalid, and the rest are OK?!?


Thanks in advance...


CE