Question: Is it possible to use the MPI_Probe or MPI_Iprobe in order to check if there's a message received by MPI_Bcast? Bye Alfonso Eng. A.A. Isola Surface Radar TU-TC-Processing Thales Nederland B.V. Haaksbergerstraat 49 Hengelo (The Netherlands) Tel. (+31) (0)74 248 4182 (only hrs. 9:00 - 16:00)