# Compiling CNS: gfortran: error: test\_f.o: No such file or directory

**URL:** <https://ask.bioexcel.eu/t/compiling-cns-gfortran-error-test-f-o-no-such-file-or-directory/5183>\
**Category:** Uncategorized\
**Created:** [July 8, 2024, 10:56pm UTC](https://ask.bioexcel.eu/t/compiling-cns-gfortran-error-test-f-o-no-such-file-or-directory/5183 "2024-07-08T22:56:58Z")\
**Posts on this page:** 1\
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**Author:** ![gractor](https://avatars.discourse-cdn.com/v4/letter/g/6a8cbe/32.png) [@gractor](https://ask.bioexcel.eu/u/gractor)\
**Post date:** [July 18, 2024, 7:06pm UTC](https://ask.bioexcel.eu/t/compiling-cns-gfortran-error-test-f-o-no-such-file-or-directory/5183/3 "2024-07-18T19:06:32Z")

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Thank you. As it turns out, we had an older version of gfortran that came with Ubuntu 20.04 and had to reinstall (not update/upgrade) before it would work.

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