I just started getting this message. I’ve been working in CC for quite a while now, well since its unveiling, and never got the message until now. The original file might have been created in CS6 but I’ve done this with earlier versions and while I did have to relink I never got this message. I’m also connecting to a remote server using VPN which I thought might be the case. Anyways, no errors in preflight, tried relinking files, embedding them…no luck. There are only 6 links, not a lot to handle, and no special characters in file names…I’m going to try Kait Hatch’s idea and save all the files to a common subfolder under my work folder and see if relinking them to there works.