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       MPI_Info_set -  Set a (key, value) pair in an MPI_Info object


       #include <mpi.h>
       int MPI_Info_set(MPI_Info info, char *key, char *value)


       key    - null-terminated character string of the index key
       value  - null-terminated character string of the value


       info   - info object (handle)


       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


       If an error occurs in an MPI function, the current MPI error handler is
       called  to  handle  it.   By default, this error handler aborts the MPI
       job.  The error handler may be changed with  MPI_Errhandler_set  ;  the
       predefined  error  handler MPI_ERRORS_RETURN may be used to cause error
       values to be returned (in C and Fortran; this  error  handler  is  less
       useful  in  with  the  C++  MPI bindings.  The predefined error handler
       MPI::ERRORS_THROW_EXCEPTIONS should be used in C++ if the  error  value
       needs  to  be recovered).  Note that MPI does not guarantee that an MPI
       program can continue past an error.

       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.  The C++  bindings  for  MPI  do  not  return  error
       values;  instead,  error values are communicated by throwing exceptions
       of type MPI::Exception (but  not  by  default).   Exceptions  are  only
       thrown if the error value is not MPI::SUCCESS .

       Note  that  if  the MPI::ERRORS_RETURN handler is set in C++, while MPI
       functions will return upon an error, there will be no  way  to  recover
       what the actual error value was.
              - No error; MPI routine completed successfully.
              -  Invalid  argument.   Some  argument  is  invalid  and  is not
              identified by a specific error class.  This is typically a  NULL
              pointer or other such error.
              -  This  error  class  is  associated  with  an  error code that
              indicates that a null key, empty key, or  key  that  was  longer
              than MPI_MAX_INFO_KEY characters was passed as an argument to an
              MPI function where it was not allowed.
              - This error  class  is  associated  with  an  error  code  that
              indicates  that  a  key that was looked up on an MPI_Info object
              and was not found.
              - An internal error has been detected.  This is  fatal.   Please
              send  a  bug report to the LAM mailing list (see http://www.lam-


       For more information, please see the official MPI Forum web site, which
       contains  the  text  of  both  the  MPI-1  and  MPI-2 standards.  These
       documents contain detailed information about each MPI function (most of
       which is not duplicated in these man pages).