Open file after crash problem

[Anonymous]

On the rare occasion that AC does crash or a power outage causes a crash.
I re-open the file & should get the Archicad project recovery dbx which when I select continue the file opens at the point where I last clicked. Great.

But sometimes I get the "This project is in use by Sabertooth (the brand of my hard drive) Open with exclusive access or read only".
So I choose the exclusive access, but this means the file is only saved up to the last manual save so it does cost me valuable work.

I am a sole practitioner & never used teamwork, nobody else has access to my files.
I have asked tech support for help, but they cannot tell me why this happens.
So I hope somebody here will have had this & knows why it happens.
TIA

[Jeff Kogut]

The search you're looking for is "taking ownership of a file or folder".

Here it is:
https://technet.microsoft.com/en-us/library/cc753659(v=ws.11).aspx

(link may need to by copy-pasted, leave it to MS to give impossible to post links)