MPI now has 3 different types of requests that I can think of, with pending proposals for (at least) 2 more: - point-to-point - collective - generalized - timers (proposed) - file (proposed) Would it be worthwhile to have a simple introspection routine that can return an enum telling you the type of a request handle? E.g., MPI_REQUEST_GET_TYPE that has an OUT parameter that will be set to MPI_REQUEST_PT2PT, MPI_REQUEST_COLLECTIVE, MPI_REQUEST_GENERALIZED, etc. I can generally see how this might be useful to applications, but I can't think of a "must have" kind of use case. Does anyone else think that this would be valuable / useful? -- Jeff Squyres [email protected] For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/