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Old 05-15-2015, 10:23 AM   #1
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Thumbs up How to recover a corrupted excel file ?


We have a file server with windows 2003 sharing some folders, since the

last lost of energy the server restarted but we have noticed that some

excel files are now corrupted, we got the following message:

"Excel cannot open the file myfile.xls because the file format or file

extension is not valid"

We have tried to open and repair the file, but always appears an empty


Also, We tried "Excel repair toolbox" application but this tool

indicates the following:

"All bytes in the file myfile.xls are equal zero. Program can not do

anything with an empty file"

Any ideas?

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Old 05-15-2015, 10:28 AM   #2
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Good luck with your search, I'd be the last person to be able to offer you help with it.

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Old 05-15-2015, 10:59 AM   #3
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I have had some problems in the past and this forum was very helpful: http://www.excelforum.com
Some of the most asinine things people do are typically preceded by the two words "Watch this".
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Old 05-15-2015, 02:22 PM   #4
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Look for files in the same directory that have a dollar sign in the name. They are temp backup files and might still be around after a hard power off.
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Old 05-15-2015, 08:01 PM   #5
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Open some good excell file and see if it shows any recovery files.

Lesson for future is get a usb drive and do regular backups to it.
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Old 05-15-2015, 08:21 PM   #6
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A shot in the dark but have you tried restoring the computer to an earlier date? (day or 2 before the loss if available) don't know if it will wrk but might be worth a try
Ken & Cyn
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Old 05-15-2015, 09:09 PM   #7
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Unfortunately restoring a computer doesn't affect the data just the OS.

Try opening the file in Libraoffice. Its a open source (free) alternative to Microsoft Office and I have used it to recover corrupt office files.
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Old 05-19-2015, 03:02 PM   #8
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Thumbs up

The following steps might help recover your file:
1. Click the File menu
2. Click Open
3. Locate the file, but do not click the Open button. Instead, click the drop-down arrow next to the Open button.
4. Click "Open and Repair"
5. In the dialog that pops up, choose "Repair". If that does not work, try the "Extract Data". Let us know if this works. If not, we will see what else we can come up with for you.
6. One more way is paid, but if nothing helps it will be useful Recovery Toolbox for Excel https://repairexcel.recoverytoolbox.com/

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