Fail to open. 3dm is not a rhino file

2 files either created or saved yesterday fail to load today. Errors are (file name).3dm is not a rhino file. I also received an error, file is not a rhino M_archive.
Older file are OK
I have backups but still several hours older than the file last saved.

System info file attached

rhino system info.txt (2.1 KB)

Any chance of I can recovere this?

1 Like

Hi Ken - were these saved to a synced folder by any chance? (Google Drive, etc)
I ask because I’ve seen one case where the syncing operation completely jumbled a users files - associating files with apparently random extensions… jpegs were text files, .3dm files were something else…

In any case if you upload one of these to, Ill take a look.


1 Like

Right. Someone probably just edited the file extension.

1 Like

These are located on our local server. Going thru several issues with IT at the moment that may be related. Altho its strange that the file saved yesterday without an issue. I tried to open this file from another computer on the network but ran into the same issue. looking like a corrupt save.
The computer issues today are related to some windows updates not playing well with my computer for some reason. Due to size (500 meg) and customer data its not possible to send the file.

Note if the extension was edited it would effect all files, not just a few of the files from yesterday, that’s why I’m thinking/Hoping its the Windows update.

Once IT guys get finished with my computer I’ll check back if there are any changes.


Old thread but I just had the same issue trying to access a file from quick access in Explorer. I’m working on a server that sometimes prompts for a username and password before browsing from a computer that was restarted. Opening the file from quick access before being prompted for password gave me the same error message because the existing alias couldn’t fetch the file.


1 Like

I’d run a test by working on a copy of the files on your local drive and copy them up to the server at the end of the day. Maybe for a week or so.

If that works, then you’ve identified the problem as being with your network setup.

If the problem persists, you’ll know it’s not the network.

1 Like

Is there a way to recover such a damaged file?

I have the same here with files stored in Dropbox and iCloud.

many thanks



Hi All,

Been seeing this problem come up from time to time.

The studio works out of Google Drive. Have had a couple of files report “file_name is not a rhino M_archive”.

Just tried to download the file directly from the Drive (in the web browser) and that did open. So, worth trying if anyone else is facing similar problems.

Have been using the Google Drive filing system since 2020, this problem has only started occurring in the past 2 months.

Hello Pascal,
I need help. I have several file will not open with an occupaning error message: C://User/LeoB1/Box… /Exterior-2 02.3dm is not a Rhino m_archive.

I now have several files like this. Can you give me instructions how to open them? I have found no satisfaction with our Forum and YouTube searches.

I have sent an email with my file link to

Thank You,
Leo Bilyeu

Hi Leo - from what I can tell the file is not a Rhino file but may be some attempt at recovering a file by some data recovery utility.


1 Like