Qualifier only valid for tape devices "<str>"

  Explanation:  A qualifier that is valid only for  tape  devices,
  is  being  used with a device that is not a tape, or with a tape
  that is not mounted with the DCL /FOREIGN qualifier.

  User Action:  Do not use this qualifier, or make sure  that  the
  tape is mounted with the DCL /FOREIGN qualifier before executing
  the RMU command.