*.dat files could have been created by a multitude of applications.

Excel is not one of them and will not open them.

See here for possible source of *.dat files

http://filext.com/alphalist.php?extstart=%5ED


Gord Dibben MS Excel MVP

On Mon, 28 Sep 2009 17:55:02 -0700, dsears
wrote:

Earlier versions of Excel spreadsheet files have .xls at the end. I believe
that the newer versions have .dat at the end.

"Bob I" wrote:

What is a .dat file?

dsears wrote:
Is there any way to "add" to my version 2003 Excel the ability to read .dat
files?