NAME

       MPI_Group_range_excl -  Produces a group by excluding ranges of processes from an existing
       group

SYNOPSIS

       int MPI_Group_range_excl(MPI_Group group, int n, int ranges[][3],
                                MPI_Group *newgroup)

INPUT PARAMETERS

       group  - group (handle)
       n      - number of elements in array ranks (integer)
       ranges - a one-dimensional array of integer triplets of the form (first rank,  last  rank,
              stride),  indicating the ranks in group of processes to be excluded from the output
              group newgroup .

OUTPUT PARAMETERS

       newgroup
              - new group derived from above, preserving the order in group (handle)

NOTE

       The MPI standard requires that each of the ranks to be excluded must be a  valid  rank  in
       the group and all elements must be distinct or the function is erroneous.

THREAD AND INTERRUPT SAFETY

       This  routine is thread-safe.  This means that this routine may be safely used by multiple
       threads without the need for any user-provided thread locks.  However, the routine is  not
       interrupt  safe.   Typically, this is due to the use of memory allocation routines such as
       malloc or other non-MPICH runtime routines that are themselves not interrupt-safe.

NOTES FOR FORTRAN

       All MPI routines in Fortran (except for MPI_WTIME  and  MPI_WTICK  )  have  an  additional
       argument  ierr  at  the  end  of  the  argument list.  ierr is an integer and has the same
       meaning as the  return  value  of  the  routine  in  C.   In  Fortran,  MPI  routines  are
       subroutines, and are invoked with the call statement.

       All MPI objects (e.g., MPI_Datatype , MPI_Comm ) are of type INTEGER in Fortran.

ERRORS

       All  MPI  routines  (except MPI_Wtime and MPI_Wtick ) return an error value; C routines as
       the value of the function and Fortran routines in the last argument.  Before the value  is
       returned,  the current MPI error handler is called.  By default, this error handler aborts
       the MPI  job.   The  error  handler  may  be  changed  with  MPI_Comm_set_errhandler  (for
       communicators),  MPI_File_set_errhandler  (for files), and MPI_Win_set_errhandler (for RMA
       windows).  The MPI-1 routine MPI_Errhandler_set may be used but  its  use  is  deprecated.
       The  predefined  error  handler  MPI_ERRORS_RETURN may be used to cause error values to be
       returned.  Note that MPI does not guarentee that an  MPI  program  can  continue  past  an
       error; however, MPI implementations will attempt to continue whenever possible.

       MPI_SUCCESS
              - No error; MPI routine completed successfully.
       MPI_ERR_GROUP
              - Null or invalid group passed to function.
       MPI_ERR_INTERN
              -  This  error  is returned when some part of the MPICH implementation is unable to
              acquire memory.
       MPI_ERR_RANK
              - Invalid source or destination rank.  Ranks must be between zero and the  size  of
              the  communicator  minus  one;  ranks  in  a  receive  (  MPI_Recv  ,  MPI_Irecv  ,
              MPI_Sendrecv , etc.) may also be MPI_ANY_SOURCE .

       MPI_ERR_ARG
              - Invalid argument.  Some argument is invalid and is not identified by  a  specific
              error class (e.g., MPI_ERR_RANK ).

SEE ALSO

       MPI_Group_free

                                            11/12/2016                    MPI_Group_range_excl(3)