If you look at the formula that links back to xxxx.xls when excel thinks the
file is open, do those formulas include the drive and path?
If they do, then the workbook isn't open. But if the drive and path are not
there (you see =[xxxx.xls]sheet1!a1, without the path), then xxxx.xls is really
Maybe the workbook's window isn't visible.
and resize the way you like.
Maybe the workbook's window is hidden.