I'm using the MPICH BVT tests to test a build of OpenMPI. While doing that, I find that 'nonblocking.c' needs to be revised as follows // int *types = NULL; MPI_Datatype *types = NULL; // types = malloc(size * sizeof(int)); types = malloc(size * sizeof(MPI_Datatype)); Presumably it works as-is for mpich because MPI_Datatype is an 'int'; but this isn't the case for other MPI implementations. Would one of the mpich developers care to make these changes to the source code ? T J (Chris) Ward, IBM Research. Scalable Data-Centric Computing - Active Storage Fabrics - IBM System BlueGene IBM United Kingdom Ltd., Hursley Park, Winchester, Hants, SO21 2JN 011-44-1962-818679 LinkedIn https://www.linkedin.com/profile/view?id=60628729 ResearchGate https://www.researchgate.net/profile/T_Ward2 IBM System BlueGene Research IBM System BlueGene Marketing IBM Resources for Global Servants IBM Branded Products IBM Branded Swag UNIX in the Cloud - Find A Place Where There's Room To Grow, with the original Open Standard. Free Trial Here Today New Lamps For Old - Diskless Remote Boot Linux from National Center for High-Performance Computing, Taiwan Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss