It isn't two identical workbooks, it's two windows open on the same
workbook. Close one window, then save the workbook and reopen.
--
David Biddulph

"Meg" wrote in message
...
Hi -

A co-worker created a spreadsheet - over the course of a few weeks,
several
tabs were added. Recently, when I received the spreadsheet via email, 2
identical workbooks opened. The 1st workbook was called 'Data (1)' and
the
2nd was called 'Data (2)'.

There wasn't a macro on either spreadsheet - I'm at a loss to why 2
identical workbooks opened. Any ideas or suggestions are appreciated.

Regards,