It doesn't sound like it to me (but that doesn't mean it isn't).

I'd still get that addin and look to see what those names referred to.

cardan wrote:

<<snipped
Hi Dave, Thank you for the insight. I did author the workbook,
however there is one sheet that I did copy and paste from a different
workbook but I don't think it is the problem. If I have say Sheet1 in
my workbook and copy it, I get Sheet1 (2). If I try to copy Sheet1(2)
I get the error. This happens with any other sheet, including the one
I copied and pasted into my workbook. Is it a macro program?

--

Dave Peterson