File format is not valid!

eqbal

Board Regular
Joined
Sep 6, 2002
Messages
92
Hi,

I've a friend which has been using an excel file as a database to keep track of its company's after sales services data. He has been using this file for about 1 year without any trouble. 2 days ago, without changing the computer, the windows and even the office version the file does not open giving the "File format is not valid" error. Now he is desperate as he unfortunately did make any backups!

He sent the file to me, and i can no open too. The office version is 2003. The file size has reached 1.07mb, which i think is too small, but thought maybe it's worth mentioning.

Any suggestions?
 

Excel Facts

What is =ROMAN(40) in Excel?
The Roman numeral for 40 is XL. Bill "MrExcel" Jelen's 40th book was called MrExcel XL.

dave3009

Well-known Member
Joined
Jun 23, 2006
Messages
7,022
Office Version
  1. 365
  2. 2016
Hi

Check if the file extension has been inadvertently changed. From what I read this issue arises when the extension changes. For your workbook the extension should be .xls.
 
Master Excel Bundle

Excel contains over 450 functions, with more added every year. That’s a huge number, so where should you start? Right here with this bundle.

Forum statistics

Threads
1,151,856
Messages
5,766,784
Members
425,378
Latest member
kapoor2892

We've detected that you are using an adblocker.

We have a great community of people providing Excel help here, but the hosting costs are enormous. You can help keep this site running by allowing ads on MrExcel.com.
Allow Ads at MrExcel

Which adblocker are you using?

Disable AdBlock

Follow these easy steps to disable AdBlock

1)Click on the icon in the browser’s toolbar.
2)Click on the icon in the browser’s toolbar.
2)Click on the "Pause on this site" option.
Go back

Disable AdBlock Plus

Follow these easy steps to disable AdBlock Plus

1)Click on the icon in the browser’s toolbar.
2)Click on the toggle to disable it for "mrexcel.com".
Go back

Disable uBlock Origin

Follow these easy steps to disable uBlock Origin

1)Click on the icon in the browser’s toolbar.
2)Click on the "Power" button.
3)Click on the "Refresh" button.
Go back

Disable uBlock

Follow these easy steps to disable uBlock

1)Click on the icon in the browser’s toolbar.
2)Click on the "Power" button.
3)Click on the "Refresh" button.
Go back
Top