Date: Thu, 18 Mar 2004 08:49:06 -0600
To: mpi-core
From: William Gropp <gropp@XXXXXXXXXXX>
Subject: MPI_COMM_PARENT and MPI_Comm_get_parent
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Rusty caught the following error in the MPI 2 spec: MPI_COMM_PARENT is used where the communicator returned by MPI_COMM_GET_PARENT is meant.  This reflects, I believe, an earlier version of the parent where we had a MPI_COMM_PARENT similar to MPI_COMM_WORLD.  There are in fact two changes needed:

Page 176, lines 4-5 change

Thus, the names of MPI_COMM_WORLD, MPI_COMM_SELF, and MPI_COMM_PARENT
will have the default of MPI_COMM_WORLD, MPI_COMM_SELF, and MPI_COMM_PARENT.

to 

Thus, the names of MPI_COMM_WORLD, MPI_COMM_SELF, and the communicator returned by MPI_COMM_GET_PARENT (if not MPI_COMM_NULL)
will have the default of MPI_COMM_WORLD, MPI_COMM_SELF, and MPI_COMM_PARENT.

Page 93, line 3-5, change 

* The manager is represented as the process with rank 0 in (the remote
* group of) MPI_COMM_PARENT. If the workers need to communicate among
* themselves, they can use MPI_COMM_WORLD.

to 

* The manager is represented as the process with rank 0 in (the remote
* group of) the parent communicator. If the workers need to communicate among
* themselves, they can use MPI_COMM_WORLD.

Bill