When you try to mirror elements in a workshared file, the system crashes, or a message informs you that the "File <file name> is being accessed by someone else and is not available."
Issue: You may encounter this problem if your networked environment uses the Windows Distributed File System (DFS).
A DFS allows system administrators to make it easier for users to access and manage files that are physically distributed across a network. With DFS, you can make files distributed across multiple servers appear to users as if they reside in one place on the network. Users no longer need to know and specify the actual physical location of files in order to access them.
Solution: None. This Windows feature has not been tested by Autodesk and is therefore not supported. Field reports suggest that use of DFS resources with Autodesk software products can result in program instability, including abnormal program termination, hung sessions, and missing/deleted files. This includes the use of DFS to house or manage administrative images and deployments.