# Segmentation Fault using covar?

**URL:** <https://gromacs.bioexcel.eu/t/segmentation-fault-using-covar/6127>\
**Category:** User discussions\
**Created:** [April 6, 2023, 2:51pm UTC](https://gromacs.bioexcel.eu/t/segmentation-fault-using-covar/6127 "2023-04-06T14:51:30Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![al42and](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/al42and/32/1393_2.png) [@al42and](https://gromacs.bioexcel.eu/u/al42and)\
**Post date:** [April 6, 2023, 5:20pm UTC](https://gromacs.bioexcel.eu/t/segmentation-fault-using-covar/6127/2 "2023-04-06T17:20:38Z")

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Hi!

This is a bug in GROMACS 2023. You can use GROMACS 2022.5 instead or use the workaround described here: [Gromacs 2023: Segmentation fault with gmx anaeig (but no problem with Gromacs 2022.4) - #4 by al42and](https://gromacs.bioexcel.eu/t/gromacs-2023-segmentation-fault-with-gmx-anaeig-but-no-problem-with-gromacs-2022-4/6062/4).

The bug will be fixed in GROMACS 2023.1, to be released by the end of April.

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_[View the full topic](https://gromacs.bioexcel.eu/t/segmentation-fault-using-covar/6127)._