MPI Forum -- we may be reading ticket #374 at the upcoming meeting in Chicago: https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/374 It provides errata for the inconsistency and ambiguity of the behavior of MPI_COMM_FREE, MPI_TYPE_FREE, and MPI_WIN_FREE, if attributes are cached on the Communicator, datatype, or window handle. In principle, the ticket is ready for voting, but feedback from the developers of MPI libraries is still appreciated as well as ticket reviews. I'll be on vacation, the ticket reporter will not come to the Meeting, and the ticket has no owner, i.e., it may be owned by the context WG, although the changes are in the datatype, context, and RMA chapters. Best regards Rolf -- Dr. Rolf Rabenseifner . . . . . . . . . .. email [email protected] High Performance Computing Center (HLRS) . phone ++49(0)711/685-65530 University of Stuttgart . . . . . . . . .. fax ++49(0)711 / 685-65832 Head of Dpmt Parallel Computing . . . www.hlrs.de/people/rabenseifner Nobelstr. 19, D-70550 Stuttgart, Germany . . . . (Office: Room 1.307)