I would very much appreciate any help with this problem: After a recent disc failure I replaced my Excel spreadsheet from back up. Since then, each time I open Excel I get the following message: "Spreadsheet.xls is already open. Reopening will cause any changes you have made to be discarded. Do you want to reopen spreadsheet.xls?" In spite of this message, there is not another instance of my worksheet or Excel open when this happens.

Many Thanks,

bilpr