‘File has been changed by another application’ error on file save

I’m getting this error whenever I save a TaskPaper document:


“The document foobarbaz.taskpaper could not be saved. The file has been changed by another application.”

My file is not located in Dropbox or Google Drive or iCloud, just my ~username folder on my hard drive.

Any ideas?

What is your TaskPaper and macOS version number?

macOS 10.13.3
TaskPaper 3.7.6

Sorry for slow reply… answer is that I don’t really know.

I’m not seeing the issue, and haven’t heard it reported elsewhere recently. It used to be a big problem with TaskPaper 2 on Dropbox… but I don’t think it’s been a problem since.

Does the problem persist through app/system restarts? Also what about if you create and save a new file … does it still happen?


I tried to figure out what might be touching the file by creating a new TaskPaper document on the desktop and tracking changes with lsof -r 1 ~/Desktop/test.taskpaper, but nothing was showing up.

However, though I could swear I tried restarting at least once, I’ve just restarted twice in a row and the problem is no longer happening.

I’ll post again if this happens again.

Thank you!

OK, I figured out why this is happening. A web development project I’m working on is using Dinghy, which is a utility for working with Docker on macOS. Apparently, it starts NFS-sharing the home directory when it starts, which is why I’m getting these errors—it’s monitoring/touching every file under ~/user, so whenever I try to save a file, it complains about having been modified elsewhere.

This ‘note on NFS sharing’ explains how to limit the scope of the NFS sharing, which will probably fix this, but I’ve lost a lot of time trying to figure this out and I’m afraid to mess with the setup of this project, so I’ll just leave it for now. I’ll report back if I have anything else to report.


Thanks for all the digging. Is this problem also showing up in other NSDocument based apps? For example do you see the problem when use TextEdit to read/write files.

Yes, it’s happening in other NSDocument-based apps like TextEdit. (see attached image)

Thanks, I think I’ll ignore it then and assume it’s an Apple or Dinghy problem to address.