Explanation
 A file handle is used by the client and server
sides of the NFS to specify a particular file or prefix. A stale file
handle occurs when the name is no longer valid, possibly due to one
of the these conditions:       
 The file or prefix was removed by the system operator.
The server was stopped and restarted. This affects files and members
below mount points.

User response
 For case 1, unmount and remount
the file system or prefix. 
 For case 2, if SAF, or if SAFEXP
security is being used, reenter the mvslogin command and retry
the request as follows:
 Change the directory back to the mount point, using the cd command 
Verify the NFS mount point is still accessible using the df command
Re-navigate to the desired object (MVS data set or member or z/OS
UNIX objects)
Re-isssue the command with the desired object.  