MPI_STATUS_SET_ELEMENTS_X(3)			     Open MPI			      MPI_STATUS_SET_ELEMENTS_X(3)

       MPI_Status_set_elements	<#mpi-status-set-elements>,  MPI_Status_set_elements_x	-  Modifies opaque part of
       status to allow MPI_Get_elements <#mpi-get-elements> to return count.

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 <#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	<#
       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
       <#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>/MPI_Init_thread <#mpi-init-thread>,
       after MPI_Finalize <#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 <#
       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>/MPI_Comm_spawn_multiple	<#
       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 <#mpi-abort> was called on that communicator. If called
	 on  a window or file, acts as if MPI_Abort <#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	<#mpi-comm-create-errhandler>	  then	   MPI_Comm_set_errhandler	<#
	 mpi-comm-set-errhandler>

       • MPI_File_create_errhandler	 <#mpi-file-create-errhandler>	   then	    MPI_File_set_errhandler	<#
	 mpi-file-set-errhandler>

       • MPI_Session_create_errhandler	 <#mpi-session-create-errhandler>   then   MPI_Session_set_errhandler	<#
	 mpi-session-set-errhandler> or at MPI_Session_init <#mpi-session-init>

       • MPI_Win_create_errhandler	<#mpi-win-create-errhandler>	  then	    MPI_Win_set_errhandler	<#
	 mpi-win-set-errhandler>

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

       See the MPI man page <#open-mpi> for a full list of MPI error codes <#open-mpi-errors>.

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

Copyright
       2003-2026, The Open MPI Community

						   Mar 05, 2026			      MPI_STATUS_SET_ELEMENTS_X(3)
