This does not appear to be a Sketchup model! Error

Hello, my 10 hour project is broken, please help someone open my file, I have a spare save that won’t open either
Road.skp (453.4 KB) (437.1 KB)

It seems that such issues occur when saving files on a network drive.

We recommend moving the problematic file to a local drive and then trying to open it again.

these files are stored on the local drive

Try this copy of your backup file. The skp file itself was all zeros.

Road.skb repaired (SU 2022).skp (449.6 KB)

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Thank you so much, you literally saved my project!

Glad that worked out for you.

Here I’ll leave a note to future problem detectives. The Central Directory inside the SKB file was truncated at the second entry and needed to be rebuilt. Evidently all of the data was intact.


What is this “central directory” black magic of which you speak? :slight_smile: What sort of tool did you use to analyze and rebuild the file? I ask not only for curiosity, but also to suggest to SketchUp folks (Hi @colin ) that they consider embedding such analysis and self-repair technology into SketchUp itself.

The common refrain on this forum when a user posts a broken SKP file is that corruption occurred due to use of network storage technologies. As a professional software engineer in the storage industry I don’t believe that is the usual culprit. Storage products wouldn’t survive on the market if they were so unreliable. (There are scenarios that might result in corruption such as disconnecting a network drive while synchronization is on-going, but it seems unlikely to me that happens in a majority of cases reported here.) There have been suggestions on the forum during the past few months that the SketchUp team is on the trail of some issues where SketchUp itself has written out bad data. I wonder what fraction of “invalid file” reports are actually due to SketchUp logic issues?

I’m hoping for the day when a version of SketchUp can self-repair many corruptions. The sort of structural issue you have observed might be a candidate for automatic detection and repair. I also remember reading a few posts where materials with very strange names have caused SketchUp to be unable to re-read the SKP file. By now I would hope the SketchUp team can recognize “bad” name patterns, and prevent SketchUp from saving them in the first place (perhaps performing an automatic transformation into a “good” name, or perhaps refusing to save until the user manually renames the specified material), and performs such a name transformation when re-reading the file (for legacy file cases).


Of course, laying the blame on network saves isn’t based on a sound understanding of the problem. It is just recognition of the fact that there is a strong correlation as well as that the problems don’t happen on local saves.

My own suspicion is that there is a subtle race condition somewhere in the process SketchUp uses while saving, and if some normally detectable and recoverable error just happens to occur at the wrong moment SketchUp doesn’t catch it and doesn’t realize it has saved junk.

This is similar to the occasional reports of a CFile Exception 0 - which if you look it up means the operation succeeded normally! In other words “something went wrong but we have no idea what”.


Hello, my 3 week project is broken, please help someone open my file, Error : This Does not appear to be +SketchUp model ! i cant upload here, because size file is 18 mb …

@CYBE You can use Dropbox, Google Drive, WeTransfer or similar to share your file. Make sure to make it public and share the link here…

Hello @tweenulzeven !! Thanku for help me. The link 17.37 MB file on MEGA
Hope can fixed …
THanku again

It doesn’t open for me, but maybe @colin is able to repair it.
I’m sure he will take a look when he has time!

thanku @tweenulzeven i hope @colin can fixed

That file is mostly zeros, and some random data from your drive. It isn’t a SketchUp model at all.

See if you have an SKB file in the same folder as the SKP. Rename that to be .skp instead of .skb, and see if it opens ok.

Hi @colin where i can found that file , actually me i install 3dx max on this pc and after finish setup , i install network license. in 2-3 min all my file like skp ,dwg etc gone and i try one recover app and show mw the file 3d.skp (my project) thats all. thanku for help me @colin

I use this Windows utility:

It can quickly find all of the files you search for. Try installing that and then search for .skp or .skb, and you should see where all of your files have gone to.

Hello @colin i try that apps, but not found the real file. Did we have another methodes .

Is it possible you have saved files to a network drive, OneDrive for example? Make sure that any such drives are still connected you your PC.

Having the same issue. Wondering if you can help @colin

SKP File:

SKB File:

The skp opened on my Mac, though very slowly. I’m going to look it over for the usual things that cause a model to be hard to work with.


For starters, the model is immense - almost 12million edges! It took almost 19GB of memory for SketchUp, which is certainly too large for the Web version to handle.

I ran TIG’s purge extension on the model (which took a long time). It revealed that you have been hoarding large amounts of unused stuff in the model:

Screenshot 2024-01-11 at 1.26.53 PM

Getting rid of the unused stuff will vastly reduce the file size, though it won’t affect the complexity of the active content of the model.

The model also contains multiple items of excessively detailed entourage elements, quite likely downloaded from the 3DWarehouse without checking them first for level of detail. For example the wall decoration with “Smile” on it (Component#339) alone has over 2.5million edges! The “bed of flower” component has almost 1.9 million edges. THE “OUTDOR DINING” has almost 1.6 million edges. Surely these and others with huge numbers of edges can be replaced with simpler ones with no loss to the model, since the fine details can’t be seen anyway. For example, the Smile component could be replaced by an image with no loss of visual interest.

I’ll be back with more once SketchUp stops spinning.

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