I am running W8.1 with Office 2013 and accessing a shared drive, When I try to save an excel document back to the shared drive - I get the error msg

"Someone else is working in "servername\share\filename" right now, please try again later"

I can see that there is no one else accessing this file at all. I created a brand new file, added content, saved and got the same error.

When I use a W7 with Office 2013 accessing the same share drive, accessing the same file - I am able to save the document without issues.

Does anyone have any ideas what this could be.  Both of these situations are while working from home using a company vpn connection. It does not happen when in the office using either W8.1 or W7.

Peter.