Gord - the DDE option was the issue. Somebody's add-in that I was trying to
test crashed Excel pretty hard. I suspect that was the villain.

Thanks.



"Gord Dibben" wrote:

In Options make sure "ignore other applications that use DDE" is unchecked.

If no joy with that................

I would suggest you re-register Excel

Close Excel first and On the Windows Taskbar

StartRun "excel.exe /regserver"(no quotes)OK.

See the space between exe and /regserver

You might have to designate a full path to excel.exe.

In that case StartRun "C:\yourpath\excel.exe" /regserver(quotes
required)OK


Gord Dibben MS Excel MVP


On Wed, 17 Feb 2010 11:14:01 -0800, Duke Carey
wrote:

A week or so ago I did *something* that has messed with my settings/config.
Now, with Excel ALREADY open, double clicking a file from Windows Explorer
causes a new Excel instance to start. Ditto when opening a mail attachment.

Other Office apps appear to be unaffected.

What's the solution? Anybody? Anybody? Beuhler?

.