Inventor 2022 Problem-drawing reverts to earlier version and loses work.

[xenocatalyst]

Hello everyone

Has anyone else experienced an issued with inventor reverting back to an earlier point in time?

In the last 24 hours we have had 3 different users working in different files (all drawings) that have suddenly reverted and lost work.

I had placed 7 views on a drawing and detailed them all and all of a sudden I only had 3 views and it was in the middle of a sketch I had done for that view. Luckily for me I was saving every 5 minutes, I just closed the file and reopened it an everything was back.

One co-worker was actively working in his drawing and lost an hours worth of work as he hadn't saved in that time.

Another co-worker clicked undo and it undid all his work in that file, again about an hours worth.

If I was to take a stab in the dark I'd say the the undo cache is gradually getting corrupted to the point where the next undo point triggers it to go to the last uncorrupted entry, this is of course just speculation.

[BDCollett]

I had experienced an issue like this with 2021, the issue was patched though so I can't imagine it's a 2022 problem.

It's quite strange that everyone is experiencing the same problem. Are you using Vault?

[xenocatalyst]

Hi BDCollett

No, we don't use vault.

[johnsonshiue]

Hi! I am not aware of the issue. How do you store Inventor files? A shared network drive, a cloud drive, or local drive?

Many thanks!

[xenocatalyst]

Hi johnsonshuie,

All our files are stored on on a networked drive, I've already had our IT guy check them.

[johnsonshiue]

Hi! Let me walk through the file saving process by Inventor. When you hit Save button, Inventor saves the active document to xxxx.NewVer. Once the save is done, the existing file will be moved to \OldVersions\ with a number extension. And, the xxxx.NewVer is renamed to xxxx.ipt for example (or iam or idw/dwg).

The revert behavior sounds like the file-saving process was interrupted. At which point, it is hard to tell. But, one may be able to look at the Windows log and see what point it failed.

Is it possible that several users were editing the same files? Or, they were trying to save but the server was busy?

Many thanks!

[xenocatalyst]

johnsonshiue

That was one of my thoughts.

Our server is set up to do a previous versions backup every hour.

I have had the unfortunate luck of trying to save while it performs this backup. It resulted in an error while saving, but all I had to do was save the file again.

In each case there was only one person working with the files.

With this current problem, In my situation where I was actively saving the file, it was saved properly to the network but reverted to an earlier state while I was was working with the file.

To me this seems more like a memory glitch rather than a disk write error, but of course, I cant rule it out.

[johnsonshiue]

Hi! Do you use any PDM system? If not, I am afraid you could run into disastrous situation sooner or later. Inventor as a file-based CAD system, loads files in the memory to process for better performance. The files on disc remain unchanged until a save event. Without a PDM system, there isn't ownership. So, all files are fair game. They can be altered, saved by anybody when you are editing it.

This can lead to very confusing behavior. Things like you lost your edit. Or, you change somebody else's files inadvertently. If it is not handled properly, corruption can happen.

Many thanks!

[xenocatalyst]

We don't use a PDM, and we are well aware of the issues caused by multiple users in a project.

Nearly all the work we do is single user per project.

Accidental tampering by other users can be entirely ruled out, this is definitely not the cause.