# Installation error

**URL:** <https://gromacs.bioexcel.eu/t/installation-error/1909>\
**Category:** User discussions\
**Created:** [April 7, 2021, 5:28am UTC](https://gromacs.bioexcel.eu/t/installation-error/1909 "2021-04-07T05:28:44Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![deguchi](https://avatars.discourse-cdn.com/v4/letter/d/9d8465/32.png) [@deguchi](https://gromacs.bioexcel.eu/u/deguchi)\
**Post date:** [April 7, 2021, 5:28am UTC](https://gromacs.bioexcel.eu/t/installation-error/1909/1 "2021-04-07T05:28:44Z")

</div>

GROMACS version 5.1.5  
gcc version 7.3.1  
cmake version 3.9.6

Hi, I tryed to install GROMACS-5.1.5. And I got error when I run “cmake” command and I could not install. What is this problem and how can I solve it?

error:  
CMake Error at tests/CMakeLists.txt:57 (message):  
error: downloading  
‘[http://gerrit.gromacs.org/download/regressiontests-5.1.5.tar.gz](http://gerrit.gromacs.org/download/regressiontests-5.1.5.tar.gz)’ failed

status\_code: 35

status\_string: “SSL connect error”

---

<div class="post-metadata">

**Author:** ![alevilla](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/alevilla/32/439_2.png) [@alevilla](https://gromacs.bioexcel.eu/u/alevilla)\
**Post date:** [April 8, 2021, 3:57pm UTC](https://gromacs.bioexcel.eu/t/installation-error/1909/2 "2021-04-08T15:57:19Z")

</div>

Hi,

I tried now to download the regressiontest from  
[https://manual.gromacs.org/documentation/5.1.5/download.html](https://manual.gromacs.org/documentation/5.1.5/download.html)  
and it worked. Can it be that the server was done when you tried?  
In general, I would suggest to use more recent version.  
[https://manual.gromacs.org/documentation/current/index.html#](https://manual.gromacs.org/documentation/current/index.html#)

best regards  
Alessandra

---

<div class="post-metadata">

**Author:** ![deguchi](https://avatars.discourse-cdn.com/v4/letter/d/9d8465/32.png) [@deguchi](https://gromacs.bioexcel.eu/u/deguchi)\
**Post date:** [April 9, 2021, 8:06am UTC](https://gromacs.bioexcel.eu/t/installation-error/1909/3 "2021-04-09T08:06:13Z")

</div>

Thanks for your reply.  
It would be better to use recent version. I will follow your advice.

Best regards,  
Deguchi