Unexpected File Format - HELP

Hello all. Today I lost about 40 hours of work. When I attempt to open either the .skp or skb file I get the “Unexpected File Format” error. I am attaching the file. Any help would be greatly appreciated. My class assignment is due in just a few days. Desperate here!


Couldn’t upload the file so using a Onedrive link.

skp not attached, try again…

There you go. Thanks in advance for any help!

unfortunately it also fails on my mac…

I also can’t open it, Mac as well. Can you try sharing the .skb file? Also, I don’t know if versioning works for .skp, but if you had the file in your “OneDrive” maybe this tutorial could help?http://www.7tutorials.com/how-recover-previous-versions-your-documents-onedrive
I think google drive and dropbox have a similar feature if you’re using their native apps on your PC and have your SketchUp files in there. Also found this for windows:

Vista/Win7 also uses Shadow Copy Service to save previous versions of files. If you have a file you modified, but need a previous version of the file, right-click on it and select “Previous Versions”. A list will come up with all if the previous versions of the file that you can either open, copy to a new location, or simply restore to the original location.

Hope something there helps.

So far I haven’t been able to recover anything from the document on my mac. Please share the .skb.


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Sadly, I was working from a flash drive going back and forth from school. So no shadow copies or backups.

Here is a link to the SKB file.


Aaah, a flash drive, you may be in luck. The memory controller on a flash drive intentionally rotates the blocks so as to evenly distribute the writes. There is a small chance you can get an older save by using a technique like this:
Howto Geek Link
Of course, don’t waste too much time on it, in case it doesn’t work. I did try the .skb, and it didn’t work. I’m sorry I wasn’t more of a help.

Thank you for trying.

I’ve already tried a few recovery programs, no good.
I guess I am out of luck unless there are any more ideas.

The .skb has the same problem as the .skp - both files are truncated. I’m sorry, but I haven’t been able to repair either file :frowning: