# Tool interfaces **URL:** https://calculix.discourse.group/c/tool-interfaces/14.md [Latest](https://calculix.discourse.group/latest.md) · [Categories](https://calculix.discourse.group/categories.md) --- ## [About the Tool interfaces category](https://calculix.discourse.group/t/about-the-tool-interfaces-category/3744)
**Author:** [@dhondt](https://calculix.discourse.group/u/dhondt)\ **Replies:** 0\ **Last updated:** [January 20, 2026, 1:01pm UTC](https://calculix.discourse.group/t/about-the-tool-interfaces-category/3744 "2026-01-20T13:01:01Z")
Using CalculiX with external software and workflows: meshing tools, preprocessors/postprocessors (e.g. ParaView, FreeCAD, Gmsh), scripting, automation, HPC, co-simulation, and pipelines. --- ## [Freecad 1.1 available](https://calculix.discourse.group/t/freecad-1-1-available/3845)
**Author:** [@Stefano4000](https://calculix.discourse.group/u/Stefano4000)\ **Replies:** 6\ **Last updated:** [September 29, 2026, 8:08pm UTC](https://calculix.discourse.group/t/freecad-1-1-available/3845 "2026-09-29T20:08:37Z")
with many improvements to calculix and Elmer. Binaries available today. Python 3.11 is here compiled. But significant features are planned in FEM Workbench. Do you need a calculix feature in freecad? not an issue… --- ## [Collected posts on third party developments, examples, etc](https://calculix.discourse.group/t/collected-posts-on-third-party-developments-examples-etc/3827)
**Author:** [@Durbul](https://calculix.discourse.group/u/Durbul)\ **Replies:** 26\ **Last updated:** [September 24, 2026, 9:57am UTC](https://calculix.discourse.group/t/collected-posts-on-third-party-developments-examples-etc/3827 "2026-09-24T09:57:24Z")
This post contains several issues from the CalculiX GitHub repository that have been closed due to our new issue policy (\[Announcement\] Issue policy on GitHub · Issue #158 · Dhondtguido/CalculiX · GitHub) and were transf… --- ## [Abq2ccx input converter (Abaqus to CalculiX)](https://calculix.discourse.group/t/abq2ccx-input-converter-abaqus-to-calculix/4017)
**Author:** [@Stefano4000](https://calculix.discourse.group/u/Stefano4000)\ **Replies:** 9\ **Last updated:** [September 23, 2026, 4:44pm UTC](https://calculix.discourse.group/t/abq2ccx-input-converter-abaqus-to-calculix/4017 "2026-09-23T16:44:13Z")
abq2ccx is a tool to convert abaqus inp file into calculix inp file. So work is here greatly reduced to run abaqus inp files in calculix. Calculix 2.22 is here actual state with 141 cards. For chiefs here: Only 3 r… --- ## [Precice calculix adapter 2.20.2 available](https://calculix.discourse.group/t/precice-calculix-adapter-2-20-2-available/4088)
**Author:** [@Stefano4000](https://calculix.discourse.group/u/Stefano4000)\ **Replies:** 0\ **Last updated:** [August 14, 2026, 2:39pm UTC](https://calculix.discourse.group/t/precice-calculix-adapter-2-20-2-available/4088 "2026-08-14T14:39:06Z")
The adapter supports calculix 2.20 with now less errors and limitations. Next step is support of newer calculix 2.23 or next calculix. --- ## [Official python wrapper of calculix like PyMFEM?](https://calculix.discourse.group/t/official-python-wrapper-of-calculix-like-pymfem/3871)
**Author:** [@Stefano4000](https://calculix.discourse.group/u/Stefano4000)\ **Replies:** 4\ **Last updated:** [June 14, 2026, 5:19pm UTC](https://calculix.discourse.group/t/official-python-wrapper-of-calculix-like-pymfem/3871 "2026-06-14T17:19:44Z")
PyMFEM is python adapter to MFEM PyMFEM supports the previous version of MFEM and develops actual version. Same should be available by calculix. Actual are partly supported tools pyCCX, pygccx and others which sup… --- ## [Precice 3.4.0 available](https://calculix.discourse.group/t/precice-3-4-0-available/3858)
**Author:** [@Stefano4000](https://calculix.discourse.group/u/Stefano4000)\ **Replies:** 6\ **Last updated:** [June 14, 2026, 5:16pm UTC](https://calculix.discourse.group/t/precice-3-4-0-available/3858 "2026-06-14T17:16:15Z")
See actual calculix adapter is with version 2.20.1 quite old. Perhaps a Meeting in Munich by TUM and MTU can solve this. In Doku precice 3.0.x is here a team with calculix 2.20 and the adapter 2.20.1. So perhaps an … --- ## [Question New surfaces and new solids of reduced model after optimization with beso to CGX or other tool?](https://calculix.discourse.group/t/question-new-surfaces-and-new-solids-of-reduced-model-after-optimization-with-beso-to-cgx-or-other-tool/3857)
**Author:** [@Stefano4000](https://calculix.discourse.group/u/Stefano4000)\ **Replies:** 22\ **Last updated:** [May 27, 2026, 9:19am UTC](https://calculix.discourse.group/t/question-new-surfaces-and-new-solids-of-reduced-model-after-optimization-with-beso-to-cgx-or-other-tool/3857 "2026-05-27T09:19:19Z")
Question New surfaces and new solids of reduced model after optimization with beso to CGX or other tool? How to make? The outer nodes of the results are points or near a new outer surface. I see here Matthek or levien … --- ## [Automated simulation Pipelines for CalculiX using FreeCAD](https://calculix.discourse.group/t/automated-simulation-pipelines-for-calculix-using-freecad/3938)
**Author:** [@openCAE-solutions](https://calculix.discourse.group/u/openCAE-solutions)\ **Replies:** 5\ **Last updated:** [May 10, 2026, 7:21pm UTC](https://calculix.discourse.group/t/automated-simulation-pipelines-for-calculix-using-freecad/3938 "2026-05-10T19:21:33Z")
Hi, I received quite a positive response to some of my LinkedIn posts, so I thought this might be of interest to the CalculiX community as well. I’ve recently been working on automated parameter variation and simulatio… --- ## [PyLabFEA: ML of yield functions with Abaqus and perhaps this year with calculix](https://calculix.discourse.group/t/pylabfea-ml-of-yield-functions-with-abaqus-and-perhaps-this-year-with-calculix/3876)
**Author:** [@Stefano4000](https://calculix.discourse.group/u/Stefano4000)\ **Replies:** 0\ **Last updated:** [April 12, 2026, 4:48pm UTC](https://calculix.discourse.group/t/pylabfea-ml-of-yield-functions-with-abaqus-and-perhaps-this-year-with-calculix/3876 "2026-04-12T16:48:49Z")
PyLabFEA does have an example of machine learning of material yield functions. Isotropic and anisotropic examples are shown in a science article. See Abaqus example with umat. So calculix should be also possible.… --- ## [Pystra: for Postprozessing Reliability](https://calculix.discourse.group/t/pystra-for-postprozessing-reliability/3861)
**Author:** [@Stefano4000](https://calculix.discourse.group/u/Stefano4000)\ **Replies:** 0\ **Last updated:** [April 6, 2026, 4:44pm UTC](https://calculix.discourse.group/t/pystra-for-postprozessing-reliability/3861 "2026-04-06T16:44:04Z")
See GitHub - pystra/pystra: Python Structural Reliability Analysis · GitHub An example with FEM program opensees (a structural and geotechnical code to prevent und minimize damages by earthquake) is done. Reliability … --- ## [CalculiX server tool available](https://calculix.discourse.group/t/calculix-server-tool-available/3856)
**Author:** [@Stefano4000](https://calculix.discourse.group/u/Stefano4000)\ **Replies:** 2\ **Last updated:** [April 4, 2026, 9:49am UTC](https://calculix.discourse.group/t/calculix-server-tool-available/3856 "2026-04-04T09:49:10Z")
See --- ## [Can’t make sense of CalculiX errors? I built an open-source tool to help diagnose them](https://calculix.discourse.group/t/can-t-make-sense-of-calculix-errors-i-built-an-open-source-tool-to-help-diagnose-them/3854)
**Author:** [@cce](https://calculix.discourse.group/u/cce)\ **Replies:** 2\ **Last updated:** [April 3, 2026, 11:06pm UTC](https://calculix.discourse.group/t/can-t-make-sense-of-calculix-errors-i-built-an-open-source-tool-to-help-diagnose-them/3854 "2026-04-03T23:06:38Z")
One of the most frustrating parts of using CalculiX, at least for me, is not always the modeling itself, but what happens after you hit solve. Sometimes the job crashes with a wall of warnings and errors. Sometimes it … --- ## [How to save UMAT calculations to a text file](https://calculix.discourse.group/t/how-to-save-umat-calculations-to-a-text-file/3830)
**Author:** [@k3rrig4n](https://calculix.discourse.group/u/k3rrig4n)\ **Replies:** 6\ **Last updated:** [March 20, 2026, 8:49am UTC](https://calculix.discourse.group/t/how-to-save-umat-calculations-to-a-text-file/3830 "2026-03-20T08:49:42Z")
Hello guys. I have a question. Is it possible to save some calculations from UMAT, specifically the rotation matrix in umat\_single\_crystal, to a text file? I tried modifying the UMAT itself and added code to do so, but i… --- ## [Salome-CCX-ParaView workflow issue](https://calculix.discourse.group/t/salome-ccx-paraview-workflow-issue/3775)
**Author:** [@umut](https://calculix.discourse.group/u/umut)\ **Replies:** 14\ **Last updated:** [February 10, 2026, 4:12pm UTC](https://calculix.discourse.group/t/salome-ccx-paraview-workflow-issue/3775 "2026-02-10T16:12:39Z")
Dear all, I’m not exactly new to CalculiX, but I’m struggling to find a reliable pre-to-post-processing workflow. Especially, how to post-process on surface sets. My current workflow is: Mesh created in Salome (volum… --- ## [CalculiX & Mfront](https://calculix.discourse.group/t/calculix-mfront/205)
**Author:** [@rafal.brzegowy](https://calculix.discourse.group/u/rafal.brzegowy)\ **Replies:** 94\ **Last updated:** [January 11, 2026, 7:54am UTC](https://calculix.discourse.group/t/calculix-mfront/205 "2026-01-11T07:54:12Z")
Hi, @xyont Try the updated version, I modified the example to allow to enter your own values (this 3.3 version is portable - I think). @Brick StandardElasticity{young\_modulus : 150e9, poisson\_ratio : 0.3}; @StateVaria… --- ## [Simplify Your CalculiX Simulations with Inductiva](https://calculix.discourse.group/t/simplify-your-calculix-simulations-with-inductiva/3711)
**Author:** [@eoliveira](https://calculix.discourse.group/u/eoliveira)\ **Replies:** 0\ **Last updated:** [January 7, 2026, 4:26pm UTC](https://calculix.discourse.group/t/simplify-your-calculix-simulations-with-inductiva/3711 "2026-01-07T16:26:13Z")
Dear CalculiX community, If you are running large-scale CalculiX simulations or dealing with compute-intensive workloads, you may find Inductiva useful. Inductiva provides cloud-based, high-performance infrastructure w… --- ## [Cubit-CalculiX 2025.9](https://calculix.discourse.group/t/cubit-calculix-2025-9/2884)
**Author:** [@NorbertH](https://calculix.discourse.group/u/NorbertH)\ **Replies:** 2\ **Last updated:** [October 8, 2025, 5:06pm UTC](https://calculix.discourse.group/t/cubit-calculix-2025-9/2884 "2025-10-08T17:06:04Z")
Hi everyone, a new update for the CalculiX Component for Cubit is out. As always you can find the source and the binaries on Github. What’s new: changing cubit version to 2025.8 some bug fixes that caused crashing… --- ## [Calculix and Cubit setup on windows 11](https://calculix.discourse.group/t/calculix-and-cubit-setup-on-windows-11/2807)
**Author:** [@mj0496](https://calculix.discourse.group/u/mj0496)\ **Replies:** 6\ **Last updated:** [September 8, 2025, 5:14pm UTC](https://calculix.discourse.group/t/calculix-and-cubit-setup-on-windows-11/2807 "2025-09-08T17:14:51Z")
Hello, I tried adding the calculix windows build plug in on cubit, but as soon as I do it and relaunch Cubit, it fails as the program does not respond. The second I delete the windows build directory, Cubit launches succ… --- ## [Gmsh and only C3D10 elements](https://calculix.discourse.group/t/gmsh-and-only-c3d10-elements/2859)
**Author:** [@gmb](https://calculix.discourse.group/u/gmb)\ **Replies:** 9\ **Last updated:** [August 26, 2025, 8:27pm UTC](https://calculix.discourse.group/t/gmsh-and-only-c3d10-elements/2859 "2025-08-26T20:27:08Z")
Hello! I’d like to ask for some help. I want to generate a mesh using gmsh for Calculix, specifically using only C3D10 elements. I have a cube.geo file as follows: SetFactory("OpenCASCADE"); // 1x1x1 cube Merge "cube… --- ## [MbDFEM: Combining Multibody Dynamics and Finite Element Method](https://calculix.discourse.group/t/mbdfem-combining-multibody-dynamics-and-finite-element-method/2674)
**Author:** [@aiksiongkoh](https://calculix.discourse.group/u/aiksiongkoh)\ **Replies:** 5\ **Last updated:** [July 29, 2025, 10:40pm UTC](https://calculix.discourse.group/t/mbdfem-combining-multibody-dynamics-and-finite-element-method/2674 "2025-07-29T22:40:46Z")
Hi: Jose Egas and I have been working on combining Multibody Dynamics and Finite Element Method inside FreeCAD. Our initial results are shown at We would appreciate your feedback and suggestions. Thanks, Aik-Siong K… --- ## [preCICE Workshop 2025 – Couple your CalculiX simulations](https://calculix.discourse.group/t/precice-workshop-2025-couple-your-calculix-simulations/2651)
**Author:** [@benjamin.uekermann](https://calculix.discourse.group/u/benjamin.uekermann)\ **Replies:** 2\ **Last updated:** [July 15, 2025, 7:45am UTC](https://calculix.discourse.group/t/precice-workshop-2025-couple-your-calculix-simulations/2651 "2025-07-15T07:45:02Z")
preCICE is an open-source coupling library for partitioned multi-physics and multi-scale simulations. It enables the efficient, robust, and parallel coupling of separate single-physics solvers. preCICE treats these solve… --- ## [Cubit-CalculiX 2025.5](https://calculix.discourse.group/t/cubit-calculix-2025-5/2749)
**Author:** [@NorbertH](https://calculix.discourse.group/u/NorbertH)\ **Replies:** 0\ **Last updated:** [May 29, 2025, 1:12pm UTC](https://calculix.discourse.group/t/cubit-calculix-2025-5/2749 "2025-05-29T13:12:55Z")
Hi everyone, a new update for the CalculiX Component for Cubit is out. As always you can find the source and the binaries on Github. So what is new: changing cubit version to 2025.3 windows history bug is now fixed … --- ## [Frd to vtu converter](https://calculix.discourse.group/t/frd-to-vtu-converter/1287)
**Author:** [@JWilliams](https://calculix.discourse.group/u/JWilliams)\ **Replies:** 8\ **Last updated:** [April 15, 2025, 10:42pm UTC](https://calculix.discourse.group/t/frd-to-vtu-converter/1287 "2025-04-15T22:42:48Z")
Hello everyone, I had a go at developing a converter that creates ascii or binary vtu files from ascii frd files. The converter uses vtu11 (https://github.com/phmkopp/vtu11) for writing the vtu file. The frd file is map… --- ## [Cubit-CalculiX 2024.12](https://calculix.discourse.group/t/cubit-calculix-2024-12/2533)
**Author:** [@NorbertH](https://calculix.discourse.group/u/NorbertH)\ **Replies:** 1\ **Last updated:** [December 22, 2024, 3:21pm UTC](https://calculix.discourse.group/t/cubit-calculix-2024-12/2533 "2024-12-22T15:21:59Z")
Hi everyone, a new update for the CalculiX Component for Cubit is out. As always you can find the source and the binaries on Github. So what is new: We implemented a Materiallibrary. The syntax is similar to the sta… --- ## [How to automate the operation of calculix](https://calculix.discourse.group/t/how-to-automate-the-operation-of-calculix/2458)
**Author:** [@liberty](https://calculix.discourse.group/u/liberty)\ **Replies:** 5\ **Last updated:** [November 4, 2024, 8:37am UTC](https://calculix.discourse.group/t/how-to-automate-the-operation-of-calculix/2458 "2024-11-04T08:37:32Z")
I now have many input files that need to be submitted for calculations, and these files must be calculated individually. My operating system is Windows 11, and I have two questions that I am quite confused about: How t… --- ## [Error in reading frd file](https://calculix.discourse.group/t/error-in-reading-frd-file/2457)
**Author:** [@Antonio\_Crupi](https://calculix.discourse.group/u/Antonio_Crupi)\ **Replies:** 1\ **Last updated:** [October 29, 2024, 8:30am UTC](https://calculix.discourse.group/t/error-in-reading-frd-file/2457 "2024-10-29T08:30:55Z")
Hello Support, I runned a coupled thermal displacemente analysis in transient mode. The calculation finished correctly and I have obtained the results. I have a .frd file of 13 Gb, the problem is that when I got to red t… --- ## [Cubit-CalculiX 2024.10](https://calculix.discourse.group/t/cubit-calculix-2024-10/2449)
**Author:** [@NorbertH](https://calculix.discourse.group/u/NorbertH)\ **Replies:** 0\ **Last updated:** [October 23, 2024, 8:27am UTC](https://calculix.discourse.group/t/cubit-calculix-2024-10/2449 "2024-10-23T08:27:31Z")
Hi everyone, we made a update for the CalculiX Component for Cubit. As always you can find the source and the binaries on Github. So what’s new: • save file support: the Cubit-CalculiX data will now be saved and loa… --- ## [Using step/iges file with ccx](https://calculix.discourse.group/t/using-step-iges-file-with-ccx/2397)
**Author:** [@MS\_d](https://calculix.discourse.group/u/MS_d)\ **Replies:** 11\ **Last updated:** [September 17, 2024, 1:15pm UTC](https://calculix.discourse.group/t/using-step-iges-file-with-ccx/2397 "2024-09-17T13:15:26Z")
Hey all, Till now, I used CalculiX by manually writing .fbd files for the geometry and then solving it with ccx. Is there any option, where I can use a .step/iges file geometry with the ccx, instead of creating the .in… --- ## [Cubit-CalculiX 2024.9](https://calculix.discourse.group/t/cubit-calculix-2024-9/2403)
**Author:** [@NorbertH](https://calculix.discourse.group/u/NorbertH)\ **Replies:** 2\ **Last updated:** [September 13, 2024, 1:10pm UTC](https://calculix.discourse.group/t/cubit-calculix-2024-9/2403 "2024-09-13T13:10:03Z")
Hi everyone, we made a update for the CalculiX Component for Cubit. As always you can find the source and the binaries on Github. So what’s new: • reading and converting the results can now be done in parallel, the… [Next page](https://calculix.discourse.group/c/tool-interfaces/14.md?page=1)