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Date: Mon, 04 Jun 2001 15:23:39 -0500
To: mpi-core@XXXXXXXXXXX
From: William Gropp <gropp@XXXXXXXXXXX>
Subject: Handling errors in handle transfer functions
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What should a high-quality implementation do if an invalid handle is given to one of the transfer functions (e.g., MPI_Comm_c2f)?  I believe that the error handler on MPI_COMM_WORLD should be invoked (MPI_FILE_NULL for MPI_FILE handle transfers) because that is the specified error handler if no valid communicator/window/file is available.  A user asked this recently; I'd like to propose this as a clarification.

Bill