MPI_File_write attempts to write into the file associated with
.Ifh
(at the current individual file pointer position maintained by the system) a total number of
.Icount
data items having
.Idatatype
type from the user's buffer
.Ibuf.
The data is written into those parts of the
file specified by the current view. MPI_File_write stores the
number of
.Idatatype
elements actually written in
.Istatus.
All other fields of
.Istatus
are undefined.
.sp
It is erroneous to call this function if MPI_MODE_SEQUENTIAL mode was specified when the file was opened.
.SHERRORS
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. For MPI I/O function errors, the default error handler is set to MPI_ERRORS_RETURN. The error handler may be changed with MPI_File_set_errhandler; the predefined error handler MPI_ERRORS_ARE_FATAL may be used to make I/O errors fatal. Note that MPI does not guarantee that an MPI program can continue past an error.