.\"Copyright 2006-2008 Sun Microsystems, Inc.
.\" Copyright (c) 1996 Thinking Machines Corporation
.TH MPI_Abort 3 "Dec 08, 2009" "1.4" "Open MPI"
.SH NAME
\fBMPI_Abort\fP \- Terminates MPI execution environment.

.SH SYNTAX
.ft R
.SH C Syntax
.nf
#include <mpi.h>
int MPI_Abort(MPI_Comm \fIcomm\fP, int\fI errorcode\fP)

.SH Fortran Syntax
.ft R
.nf
INCLUDE 'mpif.h'
MPI_ABORT(\fICOMM\fP, \fIERRORCODE\fP, \fIIERROR\fP)			
	INTEGER		\fICOMM\fP,\fI ERRORCODE\fP,\fI IERROR 

.SH C++ Syntax
.nf
#include <mpi.h>
void Comm::Abort(int \fIerrorcode\fP)

.SH INPUT PARAMETERS
.ft R
.TP 1i
comm    
Communicator of tasks to abort.
.TP 1i
errorcode    
Error code to return to invoking environment.

.SH OUTPUT PARAMETER
.ft R
.TP 1i
IERROR
Fortran only: Error status (integer). 

.SH DESCRIPTION
.ft R
This routine makes a "best attempt" to abort all tasks in the group of
comm. This function does not require that the invoking environment take any
action with the error code. However, a UNIX or POSIX
environment should handle this as a return errorcode from the main program
or an abort (errorcode).
.sp
The Open MPI implementation terminates all processes in all tasks that contain a process in \fIcomm\fP, and the error code is not returned to the invoking environment.
.sp
Note: All associated processes are sent a SIGTERM.

.SH 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++ functions 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.
.sp
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.