osx man page for mpi_group_free

MPI_Group_free(3OpenMPI)												  MPI_Group_free(3OpenMPI)

NAME
       MPI_Group_free  - Frees a group.

SYNTAX
C Syntax
       #include <mpi.h>
       int MPI_Group_free(MPI_Group *group)

Fortran Syntax
       INCLUDE 'mpif.h'
       MPI_GROUP_FREE(GROUP, IERROR)
	    INTEGER   GROUP, IERROR

C++ Syntax
       #include <mpi.h>
       void Group::Free()

INPUT
/OUTPUT PARAMETER
       group	 Group (handle).

OUTPUT PARAMETER
       IERROR	 Fortran only: Error status (integer).

DESCRIPTION
       This  operation	marks  a group object for deallocation. The handle group is set to MPI_GROUP_NULL by the call. Any ongoing operation using
       this group will complete normally.

NOTE
       On return, group is set to MPI_GROUP_NULL.

ERRORS
       Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ func-
       tions  do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism
       will be used to throw an MPI:Exception object.

       Before the error value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job, except  for
       I/O  function  errors. The error handler may be changed with MPI_Comm_set_errhandler; the predefined error handler MPI_ERRORS_RETURN may be
       used to cause error values to be returned. Note that MPI does not guarantee that an MPI program can continue past an error.

Open MPI 1.2							  September 2006					  MPI_Group_free(3OpenMPI)