How to NOT open the same file again?

[Peter2]

A colleague (Version 9) double-clicks on a file three times, and the same file is opened three times.
On my PC (Version 8 ), an already opened file is not opened again.

Where can I find the right setting?

[Tracker Supp-Stefan]

Hello Peter2,

Can you please check the exact build that colleague is using (Help -> About)?
I am unable to reproduce this behaviour with build 364 and I literally went through all the Editor settings that could affect such multiple openings, and I still can only see one copy of a file.
Is the file in question stored on a network location or maybe in an e-mail (My line of thought is that if they think they click the same file but the network location / mail client returns separate copies of the same - then they might be considered as separate files by the Editor)?

Kind regards,
Stefan

[Peter2]

...Is the file in question stored on a network location or ...

Yes, it is based on "Sharepoint". PDFExch also shows a ribbon from Sharepoint. And maybe that's the problem...

[Tracker Supp-Stefan]

Hello Peter,

In that case it's likely that SharePoint serves 'different' files to the Editor, and as such it interprets them as separate and opens them anew.

Kind regards,
Stefan