Unexpected File Format after saving and reopening a .skp file

I have built a model and successfully save it into a .skp file, however, after I reopen it, I got an “Unexpected File Format” error. I tried everything I know, including importing/renaming etc but the error still exists.

Is there anyone who can help me find why it happens, and even fix it? Thank you so much!

The file is attached in the following address:

Is there a .skb (SketchUp back-up) file in the location that this file was last saved?

If there is, change the extension to .skp and try to open it.

Thank you for your answer. I tried, but the renamed .skp file from the .skb one still cannot be opened, the error is the same, “unexpected file format”. Very very strange.

I tried to recover the file, but couldn’t get anything from it.

Thank you so much! But it looks like that the thumbnail of the file can be seen, which shows the model I built. It at least means that the content of the file can be parsed in some way although the file cannot be opened.

I saved the file in a cautious way, and did not encounter anything like SketchUp crashing. So I am guessing there may be bugs in the software when saving. Look forward to your investigation about it.

Where are you saving your file?
One of the most common reasons for this issue is saving to a network drive or synced folder.
It is best to save and work locally and only make a copy as a backup to a non local drive when the file is closed.

Local drive exactly, what’s why I feel it so strange. I checked lots of posts on the Internet, and feel that this issue is not that rare. Cases like mine exist, and nobody gives a solution.

Do we still not have an answer on this issue? i have been looking on the internet and see it a common issue.
I see on a different post you have said about being able to recover the components from the corrupted file, Is this something you can do for my file.

Yes, I can try.

Hi Colin,

Thanks for getting back to me, I have 3 file formats that are listed but cant seem to upload.

I have uploaded to wetransfer and you should be able to access them though the following link.

If this is not acceptable please advise.

As usual, I only recovered the components. There won’t be anything in the scene, but the file includes 4,546 components.

Thanks Colin that’s very helpful.

Any Idea what caused this to happen? all files that I was working on were on the local drive not network or external drive.