int MPI_Get_address(void *location, MPI_Aint *address)
This routine should be used instead of MPI_Address.
This routine is both thread- and interrupt-safe. This means that this routine may safely be used by multiple threads and from within a signal handler.
All MPI objects (e.g., MPI_Datatype, MPI_Comm) are of type INTEGER in Fortran.
In Fortran, the integer type is always signed. This can cause problems on systems where the address fits into a four byte unsigned integer but the value is larger than the largest signed integer. For example, a system with more than 2 GBytes of memory may have addresses that do not fit within a four byte signed integer. Unfortunately, there is no easy solution to this problem, as there is no Fortran datatype that can be used here (using a longer integer type will cause other problems, as well as surprising users when the size of the integer type is larger that the size of a pointer in C). In this case, it is recommended that you use C to manipulate addresses.
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. Before the value is returned, the current MPI error handler is called. By default, this error handler aborts the MPI job. The error handler may be changed with MPI_Comm_set_errhandler (for communicators), MPI_File_set_errhandler (for files), and MPI_Win_set_errhandler (for RMA windows). The MPI-1 routine MPI_Errhandler_set may be used but its use is deprecated. The predefined error handler MPI_ERRORS_RETURN may be used to cause error values to be returned. Note that MPI does not guarentee that an MPI program can continue past an error; however, MPI implementations will attempt to continue whenever possible.