Dear firedrake, I just updated petsc and petsc4py (both from mapdes, using the ‘firedrake’ branch), but now whenever I try to create a mesh from firedrake import * mesh = UnitIcosahedralSphereMesh(refinement_level=2) I just get a PETSc error (see below). I also upgraded both PyOP2 and firedrake (both on ‘master’), and ran firedrake-clean, but that doesn’t help. Thanks, Eike eikemueller@Eikes-MBP $ python test.py [0]PETSC ERROR: ------------------------------------------------------------------------ [0]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation, probably memory access out of range [0]PETSC ERROR: Try option -start_in_debugger or -on_error_attach_debugger [0]PETSC ERROR: or see http://www.mcs.anl.gov/petsc/documentation/faq.html#valgrind [0]PETSC ERROR: or try http://valgrind.org on GNU/linux and Apple Mac OS X to find memory corruption errors [0]PETSC ERROR: configure using --with-debugging=yes, recompile, link, and run [0]PETSC ERROR: to get more information on the crash. -------------------------------------------------------------------------- MPI_ABORT was invoked on rank 0 in communicator MPI_COMM_WORLD with errorcode 59. NOTE: invoking MPI_ABORT causes Open MPI to kill all MPI processes. You may or may not see output from other processes, depending on exactly when Open MPI kills them. --------------------------------------------------------------------------