Problem with an excel sheet

[JuanL2290]

I had used an excel sheet forever and made some changes last noght. Now., when I try to jpdate it it says

Can somebody helpme repair it?  I appreciate your help.

JuanL

[#2]

For those of us who'd be willing to try but don't speak (or read) Spanish, can you provide an English translation of that Error message. It looks like it has something to do with the file extension....

[#3]

@mathetes 

I guess this message says that file "abc" can't be opened due to wrong format or extension. @JuanL2290 , if start Excel and within it File->Open, will it be the same?