Not working when MPI version of Calculix is used

[anirudhnehra]

Hi,
I am pleased to use this script and it works well when only 1 processor is used.
However when I use mpi with calculix with this command:
mpirun -n 4 /path/to/calculix_executable _main

there are several errors. I attach a sample _main.frd file.
Please take a look.
Also, as in this code of kitware,
https://gitlab.kitware.com/francois.mazen/calculix-to-vtk
with some explanation here:
https://www.kitware.com/easy-data-conversion-to-vtk-with-python/

It only produces a single output.vtu which is much smaller in size compared to vtu generated by this script.
Please see if the script can be improved.
Thanks and Reegards
Anirudh

sample.zip

[imirzov]

Sorry, I have no time to learn any scripts. Converter already has multi-threading which is being activated when there are several .vt* files are to be saved, i.e. when you convert a multi-step results file. So MPI is not needed. If you still need MPI - then solve it by yourself. Good luck!

[anirudhnehra]

Hi, I think you misunderstood me. What I reported is that the script provided by you works great on a result.frd generated by normal calculix solver. But if I use MPI version of that calculix solver to generated result file, the script has some errors. I don't want parallelism in script but being able to process result.frd from a MPI version of calculix. I tried opening the MPI result.frd in a text editor and found a lot of duplicate lines. I tried removing duplicate lines and submitting to script but some value errors. Regards Anirudh

…

On Sun, 25 May 2025, 7:38 pm Ihor Mirzov, ***@***.***> wrote: *imirzov* left a comment (calculix/ccx2paraview#56) <#56 (comment)> Sorry, I have no time to learn any scripts. Converter already has multi-threading which is being activated when there are several .vt* files are to be saved, i.e. when you convert a multi-step results file. So MPI is not needed. If you still need MPI - then solve it by yourself. Good luck! — Reply to this email directly, view it on GitHub <#56 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKCNOTFYR4SL5SQS5QWDCF33AHFGBAVCNFSM6AAAAAB53DS2QGVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDSMBXHA2DONRYHA> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[imirzov]

Thanx for clarification. Now I have a question if MPI Calculix has no bugs regarding FRD file writing. Are you able to perform the same calculation on MPI Calculix and normal one and compare FRD files?

[anirudhnehra]

Hi, Yes the MPI solver does well and shows JOB FINISHED. I attach two result files -one with MPI and one without MPI.(in contact_case) The calculix post processor CGX also has problem opening the document. the error seems to be extra line created in MPI result file like this: " (ccx) ***@***.***:~/Desktop/calculix/contact$ ccx2paraview ./_main.frd vtu INFO: Reading _main.frd ERROR: Can't parse line: *-1 65 3.83178 1UUSER* with regex: ^-1(.{10})(.{12})(.{12})(.{12}) Traceback (most recent call last): File "/home/anirudh/python_venv/ccx/bin/ccx2paraview", line 8, in <module> sys.exit(main()) ^^^^^^ File "/home/anirudh/python_venv/ccx/lib/python3.12/site-packages/ccx2paraview/cli.py", line 48, in main ccx2paraview.run() File "/home/anirudh/python_venv/ccx/lib/python3.12/site-packages/ccx2paraview/common.py", line 896, in run self.frd.parse_mesh() File "/home/anirudh/python_venv/ccx/lib/python3.12/site-packages/ccx2paraview/common.py", line 615, in parse_mesh self.node_block = NodalPointCoordinateBlock(self.in_file) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/anirudh/python_venv/ccx/lib/python3.12/site-packages/ccx2paraview/common.py", line 69, in __init__ match = match_line(regex, line) ^^^^^^^^^^^^^^^^^^^^^^^ File "/home/anirudh/python_venv/ccx/lib/python3.12/site-packages/ccx2paraview/common.py", line 828, in match_line raise SyntaxError(f"Can\'t parse line:\n{line}\nwith regex:\n{regex}") SyntaxError: Can't parse line: *-1 65 3.83178 1UUSER* " Maybe we can get rid of these extra lines. But these are not the only error that comes up. Sometimes some other value error is reported.(like value error "unable to parse int(float(somevalue)) conversion") I attach complete files for run as well. I used calculix launcher to convert .unv file into .inp for calculix. Thanks and Regards Anirudh

…

On Mon, May 26, 2025 at 1:09 AM Ihor Mirzov ***@***.***> wrote: *imirzov* left a comment (calculix/ccx2paraview#56) <#56 (comment)> Thanx for clarification. Now I have a question if MPI Calculix has no bugs regarding FRD file writing. Are you able to perform the same calculation on MPI Calculix and normal one and compare FRD files? — Reply to this email directly, view it on GitHub <#56 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKCNOTBPT3IS5Z5HS354LGT3AIL5LAVCNFSM6AAAAAB53DS2QGVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDSMBYGAZTKNZYHA> . You are receiving this because you authored the thread.Message ID: ***@***.***>