# Getting started **URL:** https://calculix.discourse.group/c/getting-started/7.md [Latest](https://calculix.discourse.group/latest.md) · [Categories](https://calculix.discourse.group/categories.md) --- ## [About the Getting started category](https://calculix.discourse.group/t/about-the-getting-started-category/3737)
**Author:** [@dhondt](https://calculix.discourse.group/u/dhondt)\ **Replies:** 0\ **Last updated:** [January 20, 2026, 12:54pm UTC](https://calculix.discourse.group/t/about-the-getting-started-category/3737 "2026-01-20T12:54:39Z")
Questions from new users about installing/compiling on Linux, Windows & macOS, running, and understanding the basics of CalculiX, input files, and simple analyses. --- ## [Proposal for official building instructions](https://calculix.discourse.group/t/proposal-for-official-building-instructions/4104)
**Author:** [@gmb](https://calculix.discourse.group/u/gmb)\ **Replies:** 9\ **Last updated:** [September 15, 2026, 6:09pm UTC](https://calculix.discourse.group/t/proposal-for-official-building-instructions/4104 "2026-09-15T18:09:33Z")
Hi! Being a new CalculiX user is challenging. I spent some time on this forum to find a comprehensive tutorial on how to build CalculiX. Since the repository is opening to contributions I propose a BUILD.md file that ca… --- ## [CalculiX and PaStiX solver Windows version](https://calculix.discourse.group/t/calculix-and-pastix-solver-windows-version/130)
**Author:** [@rafal.brzegowy](https://calculix.discourse.group/u/rafal.brzegowy)\ **Replies:** 96\ **Last updated:** [June 28, 2026, 7:45pm UTC](https://calculix.discourse.group/t/calculix-and-pastix-solver-windows-version/130 "2026-06-28T19:45:15Z")
Hi all, I was able to compile the windows version of ccx with the Pastix solver. But currently this version does not work, an error immediately pops up (crash of ccx). --- ## [How to install it in ubuntu software step by step](https://calculix.discourse.group/t/how-to-install-it-in-ubuntu-software-step-by-step/3929)
**Author:** [@26dr0009](https://calculix.discourse.group/u/26dr0009)\ **Replies:** 6\ **Last updated:** [May 19, 2026, 2:01pm UTC](https://calculix.discourse.group/t/how-to-install-it-in-ubuntu-software-step-by-step/3929 "2026-05-19T14:01:31Z")
how to install calculix using precice in ubontu step by step --- ## [Trouble compiling and running CalculiX with Pastix on Ubuntu 24.04](https://calculix.discourse.group/t/trouble-compiling-and-running-calculix-with-pastix-on-ubuntu-24-04/2543)
**Author:** [@kmallick](https://calculix.discourse.group/u/kmallick)\ **Replies:** 35\ **Last updated:** [April 29, 2026, 8:36pm UTC](https://calculix.discourse.group/t/trouble-compiling-and-running-calculix-with-pastix-on-ubuntu-24-04/2543 "2026-04-29T20:36:46Z")
I had Calculix 2.20 with Pastix compiled and running on Ubuntu 20.04 + CUDA 11.1 at one point. However, this time it was like pulling teeth trying to compile the stock code of Calculix 2.22 and Pastix (along with CUDA 12… --- ## [Build ccx with arpack-ng](https://calculix.discourse.group/t/build-ccx-with-arpack-ng/1544)
**Author:** [@kraviteja](https://calculix.discourse.group/u/kraviteja)\ **Replies:** 15\ **Last updated:** [April 1, 2026, 9:06pm UTC](https://calculix.discourse.group/t/build-ccx-with-arpack-ng/1544 "2026-04-01T21:06:42Z")
Greetings. I am trying to build ccx\_2.20 on ubuntu 20.04 on docker. The arpack version suggested in the official install guide () is not available anymore. I am trying to install it with the opencollab version of arpack… --- ## [Installation of CCX\_2.23 fun](https://calculix.discourse.group/t/installation-of-ccx-2-23-fun/3833)
**Author:** [@CharlieM](https://calculix.discourse.group/u/CharlieM)\ **Replies:** 11\ **Last updated:** [March 24, 2026, 2:48pm UTC](https://calculix.discourse.group/t/installation-of-ccx-2-23-fun/3833 "2026-03-24T14:48:10Z")
Installation of CCX\_2.23 fun Thanks y’all for your help. I have been following the instructions from ccx\_2.23.readme.install. a. From page 1, I have downloaded the ccx — .tar.bz2 files and bunzip2 and untar them. b. … --- ## [ARPACK, PATCH, PARPACK, and PPATCH](https://calculix.discourse.group/t/arpack-patch-parpack-and-ppatch/3832)
**Author:** [@CharlieM](https://calculix.discourse.group/u/CharlieM)\ **Replies:** 2\ **Last updated:** [March 19, 2026, 9:46pm UTC](https://calculix.discourse.group/t/arpack-patch-parpack-and-ppatch/3832 "2026-03-19T21:46:33Z")
I have been trying to install the arpack, patch, parpack, and ppatch software. It doesn’t exist anymore at Rice Uni. I chased it down to the way back machine and they just referred back to the caam.ride.edu which no long… --- ## [How to resolve multiple definition errors when building Calculix with MFront](https://calculix.discourse.group/t/how-to-resolve-multiple-definition-errors-when-building-calculix-with-mfront/3811)
**Author:** [@k3rrig4n](https://calculix.discourse.group/u/k3rrig4n)\ **Replies:** 1\ **Last updated:** [March 6, 2026, 9:19am UTC](https://calculix.discourse.group/t/how-to-resolve-multiple-definition-errors-when-building-calculix-with-mfront/3811 "2026-03-06T09:19:46Z")
Hello. I am trying to build Calculix with mfront buil library for Barlat plasticity. But i am having an error: /usr/bin/ld: mafillmm.o: in function "mafillmm\_": mafillmm.f:(.text+0x0): multiple definition of "mafillmm\_"… --- ## [How to build PaStiX4CalculiX from source on Ubuntu 22.04](https://calculix.discourse.group/t/how-to-build-pastix4calculix-from-source-on-ubuntu-22-04/3807)
**Author:** [@pzu4](https://calculix.discourse.group/u/pzu4)\ **Replies:** 13\ **Last updated:** [March 4, 2026, 2:24pm UTC](https://calculix.discourse.group/t/how-to-build-pastix4calculix-from-source-on-ubuntu-22-04/3807 "2026-03-04T14:24:51Z")
Hello everyone, I have recently been compiling CalculiX 2.22 on the Ubuntu 22.04 platform. I have successfully completed the compilation of the versions with SPOOLES 2.22 and PARDISO solvers. When compiling the PARDISO v… --- ## [Voigt/Nye notation in CCX and scaling](https://calculix.discourse.group/t/voigt-nye-notation-in-ccx-and-scaling/2840)
**Author:** [@shroud](https://calculix.discourse.group/u/shroud)\ **Replies:** 3\ **Last updated:** [January 21, 2026, 1:38pm UTC](https://calculix.discourse.group/t/voigt-nye-notation-in-ccx-and-scaling/2840 "2026-01-21T13:38:23Z")
Hello, I am currently quite confused on how to correctly account for the voigt/nye notation. When using an energy potential, the tangent can be computed with the second derivative wrt. the strain. In general, i find it… --- ## [CalculiX CAE on Windows7](https://calculix.discourse.group/t/calculix-cae-on-windows7/2971)
**Author:** [@Layson](https://calculix.discourse.group/u/Layson)\ **Replies:** 0\ **Last updated:** [December 23, 2025, 2:10pm UTC](https://calculix.discourse.group/t/calculix-cae-on-windows7/2971 "2025-12-23T14:10:01Z")
I made it to get it run on a Windows7 Sp3 platform. In my work place I can only use an offline windows7 sp3 computer, which cannot run the CalculiX CAE because cae uses python3.10 in bin/python, and clearly the latest p… --- ## [Energy balance relative in dynamic explicit calculation](https://calculix.discourse.group/t/energy-balance-relative-in-dynamic-explicit-calculation/2912)
**Author:** [@LitlHedgehog](https://calculix.discourse.group/u/LitlHedgehog)\ **Replies:** 4\ **Last updated:** [November 28, 2025, 8:08am UTC](https://calculix.discourse.group/t/energy-balance-relative-in-dynamic-explicit-calculation/2912 "2025-11-28T08:08:27Z")
Hello everyone, I’m new here and this is my first post. I have a question regarding the value shown in the solver output under “energy balance relative”. I’m trying to understand what this value represents. My assumpt… --- ## [U3 shell & General U-beam](https://calculix.discourse.group/t/u3-shell-general-u-beam/2883)
**Author:** [@calc4fem](https://calculix.discourse.group/u/calc4fem)\ **Replies:** 1\ **Last updated:** [September 28, 2025, 9:20am UTC](https://calculix.discourse.group/t/u3-shell-general-u-beam/2883 "2025-09-28T09:20:18Z")
what kind of results can be obtained with these elements except nodal displacements? As far as I got it, U-beam doesn’t return internal forces (moments, etc) --- ## [CalculiX for Windows](https://calculix.discourse.group/t/calculix-for-windows/2878)
**Author:** [@Amin](https://calculix.discourse.group/u/Amin)\ **Replies:** 9\ **Last updated:** [September 24, 2025, 12:54am UTC](https://calculix.discourse.group/t/calculix-for-windows/2878 "2025-09-24T00:54:54Z")
Hello Can someone please let me know how to install Calculix on Windows 10 computer? I have already installed PrePoMax but I am looking for a preprocessor that has a (preferably independent) GUI for preprocessing which… --- ## [Can CalculiX perform phase-field simulations](https://calculix.discourse.group/t/can-calculix-perform-phase-field-simulations/2824)
**Author:** [@charles\_tea](https://calculix.discourse.group/u/charles_tea)\ **Replies:** 1\ **Last updated:** [July 26, 2025, 10:55am UTC](https://calculix.discourse.group/t/can-calculix-perform-phase-field-simulations/2824 "2025-07-26T10:55:21Z")
Hello, everyone, I’m new to Calculix. Here I have a simple question. Could anyone please tell me if CalculiX is capable of performing phase-field simulations? I haven’t come across any relevant case studies. --- ## [I am just getting started](https://calculix.discourse.group/t/i-am-just-getting-started/2818)
**Author:** [@Omar](https://calculix.discourse.group/u/Omar)\ **Replies:** 1\ **Last updated:** [July 22, 2025, 5:57pm UTC](https://calculix.discourse.group/t/i-am-just-getting-started/2818 "2025-07-22T17:57:32Z")
I want to automate simulations with a full solution using python to modify the input files so I got wsl2 running on my windows machine and I setup CUDA so I can use Pastix for GPU acceleration and was lanning to use para… --- ## [Compiling vs precompiled](https://calculix.discourse.group/t/compiling-vs-precompiled/2816)
**Author:** [@lukerickert](https://calculix.discourse.group/u/lukerickert)\ **Replies:** 1\ **Last updated:** [July 22, 2025, 12:58pm UTC](https://calculix.discourse.group/t/compiling-vs-precompiled/2816 "2025-07-22T12:58:16Z")
Hi all, I am no expert when it comes to compiling software like this. I have spent a bunch of time trying to get my new computer setup with the modern solvers (PaStiX) but can’t get the damn thing to work. There are l… --- ## [\*ERROR in openfile?](https://calculix.discourse.group/t/error-in-openfile/2808)
**Author:** [@Disla](https://calculix.discourse.group/u/Disla)\ **Replies:** 3\ **Last updated:** [July 17, 2025, 11:28am UTC](https://calculix.discourse.group/t/error-in-openfile/2808 "2025-07-17T11:28:24Z")
Hi, ccx is unable to manage a file named Тест\_7\_6\_Temperature\_and\_gap.inp Simple cube input file as example. If saved an named like shown above gives error message \*ERROR in openfile: could not open file ???\_7\_6\_Temp… --- ## [Using the feacluster.com ccx install script with Intel HPC Toolkit v2024.1.0](https://calculix.discourse.group/t/using-the-feacluster-com-ccx-install-script-with-intel-hpc-toolkit-v2024-1-0/2220)
**Author:** [@Benny\_Hill](https://calculix.discourse.group/u/Benny_Hill)\ **Replies:** 36\ **Last updated:** [May 22, 2024, 7:40pm UTC](https://calculix.discourse.group/t/using-the-feacluster-com-ccx-install-script-with-intel-hpc-toolkit-v2024-1-0/2220 "2024-05-22T19:40:55Z")
Hello Calculix Community, I tried to run the CCX perl install script which I found here https://www.feacluster.com/install/install to compile ccx 2.21 with the PARDISO solver. Unfortunately the script stops because it c… --- ## [Compilation error ccx 2.21](https://calculix.discourse.group/t/compilation-error-ccx-2-21/1825)
**Author:** [@srg\_nktn](https://calculix.discourse.group/u/srg_nktn)\ **Replies:** 18\ **Last updated:** [January 16, 2024, 3:30am UTC](https://calculix.discourse.group/t/compilation-error-ccx-2-21/1825 "2024-01-16T03:30:46Z")
Hi. While compiling ccx 2.21 I get the following error: /usr/bin/ld: ../../../ARPACK/libarpack\_INTEL.a(drot.o): relocation R\_X86\_64\_32 against \`.text’ can not be used when making a PIE object; recompile with -fPIE /usr…