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hi,
We often create meshes in GMSH format using the meshio library. This works OK if we stick to GMSH file format 2.2. If we use GMSH file format 4.1, DMPlex can't read them because it expects the "Entities" section to be present: [0]PETSC ERROR: Unexpected data in file [0]PETSC ERROR: File is not a valid Gmsh file, expecting $Entities, not $Nodes [0]PETSC ERROR: See https://urldefense.us/v3/__https://petsc.org/release/faq/__;!!G_uCfscf7eWS!ZfBS1KM5EBZ7ZJIu6lBKFcclVMmXteXsW8m9HBEZ5tIf0u_3duEFt9eXKF7FcorQSAQqD5SbJrYh4C8rX676S_IMI_sp6naX$ for trouble shooting. [0]PETSC ERROR: Petsc Development GIT revision: v3.21.1-124-g2d06e2faec8 GIT Date: 2024-05-08 19:31:33 +0000 [0]PETSC ERROR: waiwera on a main-debug named EN438880 by acro018 Tue May 14 11:25:54 2024 [0]PETSC ERROR: Configure options --with-x --download-hdf5 --download-zlib --download-netcdf --download-pnetcdf --download-exodusii --download-triangle --download-ptscotch --download-chaco --download-hypre [0]PETSC ERROR: #1 GmshExpect() at /home/acro018/software/PETSc/code/src/dm/impls/plex/plexgmsh.c:270 [0]PETSC ERROR: #2 DMPlexCreateGmsh() at /home/acro018/software/PETSc/code/src/dm/impls/plex/plexgmsh.c:1608 [0]PETSC ERROR: #3 DMPlexCreateGmshFromFile() at /home/acro018/software/PETSc/code/src/dm/impls/plex/plexgmsh.c:1469 [0]PETSC ERROR: #4 DMPlexCreateFromFile() at /home/acro018/software/PETSc/code/src/dm/impls/plex/plexcreate.c:5804 By default meshio doesn't seem to write the Entities section. From what I can gather, it is optional. Am I right that this section is not optional in DMPlex? - Adrian -- Dr Adrian Croucher Senior Research Fellow Department of Engineering Science Waipapa Taumata Rau / University of Auckland, New Zealand email: a.crouc...@auckland.ac.nz tel: +64 (0)9 923 4611
