A new stable release of MPICH, 4.2.1, is now available for download. This is the first bug-fix release in the 4.2.x series. This release addresses a number of user-reported crashes and build issues. It can be found on our downloads page (https://urldefense.us/v3/__https://www.mpich.org/downloads/__;!!G_uCfscf7eWS... ). For the full set of commits see https://urldefense.us/v3/__https://github.com/pmodels/mpich/compare/v4.2.0__... …v4.2.1/. Regards, The MPICH team ==================================================================== Changes in 4.2.1 ==================================================================== # Disable flat_namespace to build libmpifort on macOS by default # Prefix warning messages with "MPICH" # Add --disable-doc configure option # Fix support for building MPICH Fortran support with Xcode 15 on macOS # Fix bug in MPI_WIN_SHARED_QUERY when window is not shared # Fix bug in ch4/ofi gpu pipelining # Fixes for Intel GPU support # Fix memory leak in ch4/shm collectives # Fix bug in MPI_COMM_SPLIT with intercommunicators and non-zero root # Fix bug in DAOS ROMIO driver # Fix bug in cycling error code array # Return an error if there is failure to create a datatype in mpi_f08 module for noncontiguous user data # Return an error when shared memory segment creation fails