I have a new problem with Excel. I've been using Excel 97 for years, and I've never seen this happen before.

In the course of completing a worksheet, I include hyperlinks to supportive documentation on the internet. This works until I close and re-open the spreadsheet. As of tonight, when I re-open the spreadsheet, I am immediately met with a pop up warning from Microsoft Excel that says "File Error: Data may have been lost." When I click okay, the file opens, and the hyperlinked cells appear to be hyperlinked (blue, underlined).... but they are just text. What may have corrupted my files, my program (the error can be re-created with a new file), and what can I do to correct this?

Please help!

Thanks so much!

Jack