Hello, I'm trying to configure MPICH2 1.5 with the sock device and MULTIPLE thread support level. At first I configured without specifying anything about threads (since on my MPICH2 1.4.x machines, using just --with-device=ch3:sock does seem to build with MULTIPLE support by default). But all I obtained was SINGLE. So I tried to reconfigure the 1.5 release, now explicitly specifying --enable-threads=multiple, and got: error: The device ch3:sock does not support MPI_THREAD_MULTIPLE Yet on the README for the 1.5 release, I see: --enable-threads - Build MPICH2 with support for multi-threaded applications. Only the sock and nemesis channels support MPI_THREAD_MULTIPLE. Should this work? Any differences between 1.4 and 1.5 on this? Thanks, Nicolás