# Compilation error ccx 2.21

**URL:** <https://calculix.discourse.group/t/compilation-error-ccx-2-21/1825>\
**Category:** Getting started\
**Created:** [September 17, 2023, 7:58pm UTC](https://calculix.discourse.group/t/compilation-error-ccx-2-21/1825 "2023-09-17T19:58:52Z")\
**Posts on this page:** 1\
**Showing post:** 18

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**Author:** ![JuanP74](https://avatars.discourse-cdn.com/v4/letter/j/b5a626/32.png) [@JuanP74](https://calculix.discourse.group/u/JuanP74)\
**Post date:** [January 15, 2024, 3:45pm UTC](https://calculix.discourse.group/t/compilation-error-ccx-2-21/1825/18 "2024-01-15T15:45:48Z")

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check this link: [Build ccx with arpack-ng - #2 by JuanP74](https://calculix.discourse.group/t/build-ccx-with-arpack-ng/1544/2)

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