Question : File format is invalid

Using Excel 97 and trying to open an Excel Spreadsheet but Receiving the following error

"Contra Settlement Form.xls: File format is not valid"

Where "Contra Settlement Form" is the name of the Spreadsheet

Any ideas?

Answer : File format is invalid

If this article is closer to what happened than you probably have a corrupted file, and should check the articles inside the URL pointing to data recovery methods.

http://support.microsoft.com/support/kb/articles/Q168/2/03.ASP