We created two new tickets on MPI_Dims_create and MPI_Cart_create functionality: https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/194 https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/195 Please take a look at them and any comments as appropriate. Thanks, -- Pavan PS: Is there an MPI-3 mailing list where these kind of emails are more appropriate, instead of the general MPI Forum mailing list? -- Pavan Balaji http://www.mcs.anl.gov/~balaji