Copying my private reply that appeared off-list. If you have one base with
different element types, that's in scope for what I plan to develop soon.
Congrats, you crashed cgnsview.
$ cgnsview dl/HybridGrid.cgns
Error in startup script: file was not found
while executing
"CGNSfile $ProgData(file)"
(procedure "file_stats" line 4)
invoked from within
"file_stats"
(procedure "file_load" line 53)
invoked from within
"file_load $fname"
invoked from within
"if {$argc} {
set fname [lindex $argv [expr $argc - 1]]
if {[file isfile $fname] && [file readable $fname]} {
file_load $fname
}
}"
(file "/usr/share/cgnstools/cgnsview.tcl" line 3013)
This file looks okay in cgnscheck and paraview, but I don't have a need for
multi-block and I'm stretched really thin so probably won't make it work any
time soon. But if
you make a single block with HexElements alongside PyramidElements and
TetElements, I should be able to read it. If you don't mind prepping such a
file (this size or
smaller), it would help me test.
"Engblom, William A." <engbl...@erau.edu> writes:
> Jesus,
>
> The CGNS files we get from Pointwise have only one base, so that should not
> be an issue. However, sections are needed to contain each cell type, the
> BCs, and zonal boundaries. So, there are always several sections. The grid
> that Spencer made for you must have multiple sections. We have to be able to
> deal with grids like Spencer's example or else it's not useful.
>
> B.
>
>
>
>
>
>
> ________________________________
> From: Ferrand, Jesus A. <ferra...@my.erau.edu>
> Sent: Monday, January 16, 2023 5:41 PM
> To: petsc-users@mcs.anl.gov <petsc-users@mcs.anl.gov>
> Subject: DMPlex and CGNS
>
> Dear PETSc team:
>
> I would like to use DMPlex to partition a mesh stored as a CGNS file. I
> configured my installation with --download_cgns = 1, got me a .cgns file and
> called DMPlexCreateCGNSFromFile() on it. Doing so got me this error:
>
> [0]PETSC ERROR: --------------------- Error Message
> --------------------------------------------------------------
> [0]PETSC ERROR: Error in external library
> [0]PETSC ERROR: CGNS file must have a single section, not 4
> [0]PETSC ERROR: See https://petsc.org/release/faq/ for trouble shooting.
> [0]PETSC ERROR: Petsc Release Version 3.18.3, unknown
> [0]PETSC ERROR: ./program.exe on a arch-linux-c-debug named F86 by jesus Mon
> Jan 16 17:25:11 2023
> [0]PETSC ERROR: Configure options --download-mpich=yes --download-hdf5=yes
> --download-cgns=yes --download-metis=yes --download-parmetis=yes
> --download-ptscotch=yes --download-chaco=yes --with-32bits-pci-domain=1
> [0]PETSC ERROR: #1 DMPlexCreateCGNS_Internal() at
> /home/jesus/Desktop/JAF_NML/3rd_Party/PETSc/petsc/src/dm/impls/plex/cgns/plexcgns2.c:104
> [0]PETSC ERROR: #2 DMPlexCreateCGNS() at
> /home/jesus/Desktop/JAF_NML/3rd_Party/PETSc/petsc/src/dm/impls/plex/plexcgns.c:60
> [0]PETSC ERROR: #3 DMPlexCreateCGNSFromFile_Internal() at
> /home/jesus/Desktop/JAF_NML/3rd_Party/PETSc/petsc/src/dm/impls/plex/cgns/plexcgns2.c:27
> [0]PETSC ERROR: #4 DMPlexCreateCGNSFromFile() at
> /home/jesus/Desktop/JAF_NML/3rd_Party/PETSc/petsc/src/dm/impls/plex/plexcgns.c:29
>
> I looked around mail archives for clused and found this one
> (https://lists.mcs.anl.gov/pipermail/petsc-users/2018-June/035544.html).
> There, Matt provides a link to the source code for DMPlexCreateCGNSFromFile()
> and another (seemingly broken) link to CGNS files that can be opened with the
> former. After reading the source code I now understand that it is hardcoded
> for CGNS files that feature a single "base" and a single "section", whatever
> those are.
>
> After navigating the CGNS documentation, I can sympathize with the comments
> in the source code.
>
> Anyhow, I wanted to ask if I could be furnished with one such CGNS file that
> is compatible with DMPlexCreateCGNSFromFile() to see if I can modify my CGNS
> files to conform to it. If not, I will look into building the DAG myself
> using DMPlex APIs.
>
>
> Sincerely:
>
> J.A. Ferrand
>
> Embry-Riddle Aeronautical University - Daytona Beach FL
>
> M.Sc. Aerospace Engineering
>
> B.Sc. Aerospace Engineering
>
> B.Sc. Computational Mathematics
>
>
> Phone: (386)-843-1829
>
> Email(s): ferra...@my.erau.edu
>
> jesus.ferr...@gmail.com
