NReAttachFile invalid file handle.

Occurs on:  86 and 286.  This is an Abend error.

Meaning:  This error is generated in the file handling routines in the
          operating system if they encounter an invalid file handle.
          This error is the result of a failed internal consistency
          check and should never occur.

Cause:  This error could be caused by a memory failure in the file
        server and could be attributable to either a hardware failure or
        poor power line conditioning.  A corrupt operating system file
        might also cause this error.

Solution:  Reboot the file server.  If this error or other Abend errors
           occur repeatedly, reinstall the operating system and then
           check the file server's memory and power line conditioning.