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SYNTAX

   C Syntax
          #include <mpi.h>

          int MPI_Status_set_elements(MPI_Status *status, MPI_Datatype datatype, int count)
          int MPI_Status_set_elements_x(MPI_Status *status, MPI_Datatype datatype, MPI_Count count)

   Fortran Syntax
          USE MPI
          ! or the older form: INCLUDE 'mpif.h'
          MPI_STATUS_SET_ELEMENTS(STATUS, DATATYPE, COUNT, IERROR)
               INTEGER STATUS(MPI_STATUS_SIZE), DATATYPE, COUNT, IERROR
          MPI_STATUS_SET_ELEMENTS_X(STATUS, DATATYPE, COUNT, IERROR)
               INTEGER STATUS(MPI_STATUS_SIZE), DATATYPE
                  INTEGER(KIND=MPI_COUNT_KIND) COUNT
                  INTEGER IERROR

   Fortran 2008 Syntax
          USE mpi_f08
          MPI_Status_set_elements(status, datatype, count, ierror)
               TYPE(MPI_Status), INTENT(INOUT) :: status
               TYPE(MPI_Datatype), INTENT(IN) :: datatype
               INTEGER, INTENT(IN) :: count
               INTEGER, OPTIONAL, INTENT(OUT) :: ierror
          MPI_Status_set_elements_x(status, datatype, count, ierror)
               TYPE(MPI_Status), INTENT(INOUT) :: status
               TYPE(MPI_Datatype), INTENT(IN) :: datatype
               INTEGER(KIND = MPI_COUNT_KIND), INTENT(IN) :: count
               INTEGER, OPTIONAL, INTENT(OUT) :: ierror

INPUT/OUTPUT PARAMETER

status: Status to associate with count (status).

INPUT PARAMETERS

datatype: Data type associated with count (handle).count: Number of elements to associate with status (integer).

OUTPUT PARAMETER

ierror: Fortran only: Error status (integer).

DESCRIPTION

       MPI_Status_set_elements  modifies  the opaque part of status so that a call to :ref:`MPI_Get_elements` or
       :ref:`MPI_Get_elements_x` will return count.  :ref:`MPI_Get_count` will return a compatible value.

       A subsequent call  to  MPI_Get_count(status,  datatype,  count),  to  MPI_Get_elements(status,  datatype,
       count), or to MPI_Get_elements_x(status, datatype, count) must use a data-type argument that has the same
       type signature as the data-type argument that was used in the call to MPI_Status_set_elements.*

NOTES

       Users  are  advised  not  to  reuse  the  status  fields  for values other than those for which they were
       intended. Doing so may lead to unexpected results when using the  status  object.  For  example,  calling
       MPI_Get_elements  may cause an error if the value is out of range, or it may be impossible to detect such
       an error. The extra_state argument provided with a generalized request can be used to return  information
       that does not logically belong in status. Furthermore, modifying the values in a status set internally by
       MPI, such as :ref:`MPI_Recv`, may lead to unpredictable results and is strongly discouraged.

ERRORS

       Almost  all  MPI  routines  return  an  error  value; C routines as the return result of the function and
       Fortran routines in the last argument.

       Before the error value is returned, the current MPI  error  handler  associated  with  the  communication
       object  (e.g.,  communicator, window, file) is called.  If no communication object is associated with the
       MPI call, then the call is considered attached to MPI_COMM_SELF and will call the  associated  MPI  error
       handler.   When   MPI_COMM_SELF   is   not  initialized  (i.e.,  before  MPI_Init/MPI_Init_thread,  after
       MPI_Finalize, or when using the Sessions Model exclusively) the error raises the initial  error  handler.
       The  initial  error handler can be changed by calling MPI_Comm_set_errhandler on MPI_COMM_SELF when using
       the World model, or the mpi_initial_errhandler CLI argument to mpiexec or info  key  to  MPI_Comm_spawn/‐
       MPI_Comm_spawn_multiple.   If no other appropriate error handler has been set, then the MPI_ERRORS_RETURN
       error handler is called for MPI I/O functions and the MPI_ERRORS_ABORT error handler is  called  for  all
       other MPI functions.

       Open MPI includes three predefined error handlers that can be used:

       • MPI_ERRORS_ARE_FATAL Causes the program to abort all connected MPI processes.

       • MPI_ERRORS_ABORT An error handler that can be invoked on a communicator, window, file, or session. When
         called  on  a  communicator,  it  acts  as if MPI_Abort was called on that communicator. If called on a
         window or file, acts as if MPI_Abort was called on a communicator containing the group of processes  in
         the corresponding window or file. If called on a session, aborts only the local process.

       • MPI_ERRORS_RETURN Returns an error code to the application.

       MPI applications can also implement their own error handlers by calling:

       • MPI_Comm_create_errhandler then MPI_Comm_set_errhandlerMPI_File_create_errhandler then MPI_File_set_errhandlerMPI_Session_create_errhandler then MPI_Session_set_errhandler or at MPI_Session_initMPI_Win_create_errhandler then MPI_Win_set_errhandler

       Note that MPI does not guarantee that an MPI program can continue past an error.

       See the MPI man page for a full list of MPI error codes.

       See the Error Handling section of the MPI-3.1 standard for more information.

COPYRIGHT

       2003-2025, The Open MPI Community

                                                  Feb 17, 2025                        MPI_STATUS_SET_ELEMENTS(3)