Walid

You could try looking under ToolsAdd ins... and then uncheck anything, then
check back those that were checked one at a time, close and re-open excel,
when the error comes back, that's the faulty add-in, either go to the vendor
or unload the add-in if you don't need it

--
HTH
Nick Hodge
Microsoft MVP - Excel
Southampton, England
HIS


"Walid" wrote in message
...
Everytime i open Excel or an Excel document, i get the following error
message:

"SUMIF.XLA is already open. Reopening will cause any change you made to
be
discarded. Do you want to reopen SUMIF.XLA?"

Whether i answer YES or NO, the application will open normally. It is
just
very annouying.. HELP
--
W