equal-key  routine  and  no-duplicates  option  cannot  both  be
  specified

  Explanation:  Both an equal-key  routine  and  the  SOR$M_NODUPS
  option  were  specified  when  only  one  or the other option is
  allowed.

  User Action:   Specify  either  the  equal-key  routine  or  the
  no-duplicates option.