Hi Maciej, Unfortunately, the ULFM features have not yet been implemented for intercommunicators so what you’re seeing is not unexpected. Thanks, Wesley On 3/18/15, 8:40 AM, "Maciej Szpindler" <[email protected]> wrote:

Dear All,

I am trying to use ULFM functions implemented in MPICH. I am aware that these extensions are still just (?) experimental and not a part of the standard. Nevertheless I have tried to use MPIX_Comm_shrink, in a way described here:

https://svn.mpi-forum.org/trac/mpi-forum-web/raw-attachment/ticket/323/ft.pd...

on the intercommunicator that contains failed processes in the remote group. The function fails with:

Assertion failed in file src/mpi/comm/comm_create_group.c at line 47: comm_ptr->comm_kind == MPID_INTRACOMM

I am working with MPICH v3.2a2. May I ask for a comment on this? Is this the behaviour that should be expected?

Best Regards, Maciej _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss

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