Unexpected File Format - Help Please! recover please

The file is 189MB in size and i am using sketchup pro 2020.

Making the same post three times in three separate threads is not going to get your file recovered any more quickly.

I’m so sorry, I’m new here. The file is very important. I have a presentation in one day.

waiting for your help. thank you so much.

I understand that your file is important but as I told you, repeated posting in multiple threads isn’t going to get Colin to look at it any more quickly.

It’s @colin you need to wait for. He’s the one with the tools to possibly recover your file. I’m sure when he gets a break from his normal duties he will look at your file and do what he can with it.

you are right. I’m really sorry. I’m waiting for your answer. thanks again.

I did see your post earlier, and did get the file 15 minutes ago when you posted the link. The things I try to do to recover something takes a few minutes.

In your file’s case I got less than I normally would. Strangely, it has no components in it, I haven’t seen that before. When I can recover something, the more components there are the more useful the file is.

I did recover the materials, and tags, but nothing else. Here is the recovered file, if you can make use of the materials:

https://we.tl/t-SuW73LYJjk

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There you go. Colin has looked at your file.

Would that imply no components had been used in the model? Only groups and/or loose geometry?

i don’t know what the problem is. it had never occurred to me before.Looks like I’ll have to do it again. This is not a problem for me but I am afraid if the problem recurs.

Where were you saving the file? On your internal drive or to the cloud? Were you making components or was it all groups and/or loose geometry?

I’m saving it to the internal drive.I work by grouping them into regions.

Can you please clarify what you mean? SketchUp has no native concept of ā€œregions.ā€ Do you use SketchUp’s Group feature to collect a set of entities (edges, faces, guides, etc.) into a group, or do you use SketchUp’s Make Component feature to collect entities into a component, or some of both?

Colin’s SKP file-salvage tools seem able to sometimes find and recover components out of an SKP file, but not groups nor top-level edges and faces (that are in neither a group nor a component).

SketchUp’s Group feature

i don’t understand what the problem is. I bought accessories from different files, could that be the problem? I’ve done this before, but I’ve never experienced anything like this.What can I do to avoid this problem again?

Apparently nor does anyone else, especially including the SketchUp team, understand how SKP files get corrupted. An anecdotal connection between some reports of SKP corruption is that the file was being directly saved to a non-local storage drive, such as a cloud storage service. (As a professional software engineer in the storage industry I don’t really see why that should be relevant unless the storage service has terrible quality in which case all sorts of files should experience corruption).

Copying and pasting or importing objects from other SKP files is not likely to trigger a file corruption, I would say.

That is unknown, unfortunately, beyond folk wisdom to save to a local storage device (not cloud, not removable media). Save often and occasionally test that a saved SKP file can be reloaded.

Perhaps the SketchUp team will eventually see patterns in the corrupt SKP files they examine, if the corruptions are related to something in SketchUp’s SKP-writing logic. Perhaps they can work out ways to improve the robustness of the SKP format (e.g., checksums; some level of redundancy) or the algorithm for reading them to cope with partial loss of information that could help regardless of the case of corruption.

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The only instances of data corruption I have met were in the 1980s when saving to floppy disks that got full.
I wonder if autosaves running at the same time as some other operation might be involved.

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Thank you very much for your information. I will follow your advice.

why my file could not be recovered while other files are being recovered. do you have an idea

It would be very difficult to say exactly but if you read through the thread, most often, when Colin is able to recover anything, it’s usually only components and materials. If you were using only groups or just loose geometry, that stuff would likely be lost just as it is in the other files he recovers.

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I’m doing everything from scratch. I hope I don’t have this problem again.