I keep getting this error "This document was changed in another application" but I am not opening this doc in another application

I experience same problem on Pages, Keynote, Numbers - almost every new document that I create

Getting the same message. Started with the latest update a few days ago. So I guess it's a glitch in the current version and hope Apple will solve that soon by issuing another update which fixes that. It's really annoying and makes it quite impossible to use the application at all.

Meanwhile open Pages, go to Pages, Provide Pages Feedback, choose Feedback Type: Bug Report and explain the problem in the Comments box.

http://www.apple.com/feedback/pages.html

I think that's all you can do for now. But it's important for people to report the problem since I don't know how closely Apple is monitoring these Forums.

I suspect it to have something to do with the 'auto save' which I'm not really a friend of and which can't be turned off as far as I know. Anyway I hope Apple sends out an update soon. For now I did revert to Microsoft Office/Word.

I'm getting the same for every document I create in Pages 5.2 but only when my documents are located on a LAN-storage. I have a Synology server where I keep my documents. They are not open on multiple machines. It's a real problem as it keeps interfering with the work-flow, getting these alerts almost every 30 seconds and having to click on the non-highlighted response-option of "Save Anyway" (rather than Revert). A slip of a finger and it can wipe out your changes. Really bad design.

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I'm getting the exact same issue. I'm accessing Pages documents from a WD myCloud network storage drive and continually get 'Save Anyway' / 'Revert' pop-ups. Ridiculously frustrating. Anyone found a fix yet or am I going to have to buy MS Office to stop this nonsense?