Excel 2010 - attempting to open an .XLW file

A customer sent me an attachment in an email - the file is named info.XLW
I'm not quite sure what an XLW file is but appears to be some type of Excel document - When I try to open the file I get the message:  info.XLW: file format is not valid
Please advise.
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TemodyPickalbatros, IT ManagerCommented:
one particular .XLW  file or all the .XLW files?
If it is an issue with all the .XLW files, the file type might be blocked. Check if this file type blocked on excel security center
mmj1Author Commented:
It is only one particular .XLW file that was sent to us via email.
TemodyPickalbatros, IT ManagerCommented:
May be it very old version of file format
Check also security settings
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mmj1Author Commented:
I checked the security settings and it looks like I do have full control - so I suppose you may be right - it is a old version.
May need to ask the sender if they can provide the file in an updated format.
What version opened XLW file extensions?
TemodyPickalbatros, IT ManagerCommented:
From excel option go to trust center
On the right panel go to trust center settings
On the left panel go to file block settings
On the right panel scroll down to xml file
Make sure cml file allowed

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Ron MalmsteadInformation Services ManagerCommented:
Someone may have accidentally mistyped the file name, and messed up the file extension..by putting a "w", instead of an "s".  (notice the keys are right next to each other)

Try copying the file to your desktop.. then change the extension to .xls.. then see if it opens.
Rob HensonFinance AnalystCommented:
In an earlier version of Excel, don't recall which, you could save a group of workbooks as a "Workspace". The link that doing that created had an xlw extension. By using the xlw file it opened all files in the Workspace.

Don't know of an equivalent in recent versions.

Rob H
mmj1Author Commented:
Thank you all for your responses and suggestions.  I have tried all of the above and still cannot open the file.  I am going to request it be resent in a more current format that I can open.  Thank you!
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