Is your file local or on a server? If the latter, are your permissions
set correctly?

The file may be corrupted. If so, XL02 and XL03 are better able to
handle corruption than previous versions. I've also had success opening
corrupted files with the free OpenOffice Calc:

http://openoffice.org

In article ,
"R.VENKATARAMAN" $$$ wrote:

suddenly I am not be able to open one of my often used excel file.
when I click this file to open I get an error message
"unable to read file"

what could be the problem. I am regularly checking for antivirus though
old engine of mcaffe(updated weekly) and AVG free vesions (updated almost
daily).

is there any solution to retrieve the file.