NAME

       MPI_Lookup_name -  Lookup a previously published name

SYNOPSIS

       #include <mpi.h>
       int
       MPI_Unpublish_name(char *service_name, MPI_Info info, char *port_name)

INPUT PARAMETERS

       service_name
              - a service name
       info   - implementation-specific information
       port_name
              - a port name from MPI_Open_port

NOTES

       Currently,  LAM/MPI ignores any info keys that are passed to this function.  As such, info
       keys specific to a different  implementation  can  safely  be  passed  to  this  function.
       Additionally, the MPI constant MPI_INFO_NULL can also be used.

       The  scope  of the published name is the LAM universe -- MPI processes running on any node
       included from  the  initial  lamboot  are  capable  of  retrieving  a  name  published  by
       MPI_Publish_name .  Service names stay in existence until they are either manually removed
       with MPI_Unpublish_name or cleaned with the lamclean command.  It is a common  mistake  to
       forget  to  MPI_Unpublish_name at the end of a run, and therefore leave published names in
       the LAM runtime environment.

NOTES FOR FORTRAN

       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 Fortran.

ERRORS

       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.
       MPI_SUCCESS
              - No error; MPI routine completed successfully.
       MPI_ERR_ARG
              - 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.
       MPI_ERR_SERVICE
              - This error class is associated with an error code that indicates that there was a
              problem with the service name that was used.  Depending on the  context,  this  can
              indicate  that  the service name was already published or that the service name was
              not yet published.

SEE ALSO

       MPI_Lookup_name, MPI_Publish_name

MORE INFORMATION

       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).

       http://www.mpi-forum.org/

LOCATION

       nameunpub.c