# Install NetworkX package, version 1.11 **URL:** \ **Category:** User discussions\ **Created:** [September 3, 2020, 2:31pm UTC](https://gromacs.bioexcel.eu/t/install-networkx-package-version-1-11/763 "2020-09-03T14:31:29Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![D429321](https://avatars.discourse-cdn.com/v4/letter/d/958977/32.png) [@D429321](https://gromacs.bioexcel.eu/u/D429321)\ **Post date:** [September 3, 2020, 2:31pm UTC](https://gromacs.bioexcel.eu/t/install-networkx-package-version-1-11/763/1 "2020-09-03T14:31:29Z")
GROMACS version: 2020.1 GROMACS modification: Yes/No Hello! I want to install the NetworkX package, version 1.11 in order to execute the “python cgenff\_charmm2gmx.py JZ4 jz4\_fix.mol2 jz4.str charmm36-mar2019.ff” script. I am not able to find the correct place to install this. Kindly suggest a solution for this. Thanks for reading this question. Regards ---
**Author:** ![claudia](https://avatars.discourse-cdn.com/v4/letter/c/a88e57/32.png) [@claudia](https://gromacs.bioexcel.eu/u/claudia)\ **Post date:** [September 4, 2020, 4:51pm UTC](https://gromacs.bioexcel.eu/t/install-networkx-package-version-1-11/763/2 "2020-09-04T16:51:42Z")
I did: install python2 pip install networkx==1.11 ---
**Author:** ![jalemkul](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/jalemkul/32/18_2.png) [@jalemkul](https://gromacs.bioexcel.eu/u/jalemkul)\ **Post date:** [September 5, 2020, 1:10am UTC](https://gromacs.bioexcel.eu/t/install-networkx-package-version-1-11/763/3 "2020-09-05T01:10:34Z")
@claudia is right on, but also note that the old version of NetworkX is no longer required. We offer several versions of the script for different Python and NetworkX versions that the user might have. We support Python3 and NetworkX 2.x now. ---
**Author:** ![D429321](https://avatars.discourse-cdn.com/v4/letter/d/958977/32.png) [@D429321](https://gromacs.bioexcel.eu/u/D429321)\ **Post date:** [September 5, 2020, 7:12am UTC](https://gromacs.bioexcel.eu/t/install-networkx-package-version-1-11/763/4 "2020-09-05T07:12:29Z")
Thank you for your valuable reply. I will try it out. ---
**Author:** ![premk](https://avatars.discourse-cdn.com/v4/letter/p/e19adc/32.png) [@premk](https://gromacs.bioexcel.eu/u/premk)\ **Post date:** [November 19, 2020, 8:58am UTC](https://gromacs.bioexcel.eu/t/install-networkx-package-version-1-11/763/5 "2020-11-19T08:58:36Z")
## I have python 3.8 and networkx 2.4, but gromacs running gives me the following error. please suggest the right way This script has been tested with NetworkX 2.3, and 2.4 is buggy. Please install version 2.3 for best performance: pip uninstall networkx pip install networkx==2.3 NOTE 1: Code tested with Python 3.5.2 and 3.7.3. Your version: 3.8.3 (default, Jul 2 2020, 16:21:59) [GCC 7.3.0] ## NOTE 2: Code tested with NetworkX 2.3. Your version: 2.4 ---
**Author:** ![jalemkul](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/jalemkul/32/18_2.png) [@jalemkul](https://gromacs.bioexcel.eu/u/jalemkul)\ **Post date:** [November 19, 2020, 10:39am UTC](https://gromacs.bioexcel.eu/t/install-networkx-package-version-1-11/763/6 "2020-11-19T10:39:15Z")
This is not a GROMACS issue, but one with the CGenFF conversion script. The `pip install` command should do the trick but if not, then you need to investigate what’s going on with your Python distribution. ---
**Author:** ![premk](https://avatars.discourse-cdn.com/v4/letter/p/e19adc/32.png) [@premk](https://gromacs.bioexcel.eu/u/premk)\ **Post date:** [November 21, 2020, 5:35am UTC](https://gromacs.bioexcel.eu/t/install-networkx-package-version-1-11/763/7 "2020-11-21T05:35:18Z")
- just skeptical if i use “pip install networkx2.3”, will it be compatible with the python 3.8? - networkx2.3 compatibility is with python 3.5, 3.6, 3.7 ---
**Author:** ![jalemkul](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/jalemkul/32/18_2.png) [@jalemkul](https://gromacs.bioexcel.eu/u/jalemkul)\ **Post date:** [November 23, 2020, 2:03pm UTC](https://gromacs.bioexcel.eu/t/install-networkx-package-version-1-11/763/8 "2020-11-23T14:03:01Z")
If your `pip` is from the Python3 package, yes. ---
**Author:** ![Hyma](https://avatars.discourse-cdn.com/v4/letter/h/13edae/32.png) [@Hyma](https://gromacs.bioexcel.eu/u/Hyma)\ **Post date:** [April 28, 2022, 11:24am UTC](https://gromacs.bioexcel.eu/t/install-networkx-package-version-1-11/763/9 "2022-04-28T11:24:48Z")
Hi I have python3 and Networkx 2.3 version installed But when I run the command cgenff\_charmm2gmx\_py3\_nx2.py JZ4 jz4\_fix.mol2 jz4.str charmm36-mar2019.ff the following message appears. Unable to understand what to do ? File “cgenff\_charmm2gmx\_py3\_nx2.py”, line 991, in if(float(nx. **version** ) \< 2.0): ValueError: could not convert string to float: ‘2.5.1’ I am using gromacs-2021.5 version ---
**Author:** ![Swall](https://avatars.discourse-cdn.com/v4/letter/s/ac8455/32.png) [@Swall](https://gromacs.bioexcel.eu/u/Swall)\ **Post date:** [October 6, 2022, 2:26pm UTC](https://gromacs.bioexcel.eu/t/install-networkx-package-version-1-11/763/10 "2022-10-06T14:26:28Z")
Hi Hyma, did you solved it to problem? ---
**Author:** ![Hyma](https://avatars.discourse-cdn.com/v4/letter/h/13edae/32.png) [@Hyma](https://gromacs.bioexcel.eu/u/Hyma)\ **Post date:** [October 8, 2022, 5:26pm UTC](https://gromacs.bioexcel.eu/t/install-networkx-package-version-1-11/763/11 "2022-10-08T17:26:02Z")
Thanks for your concern. I am glad that I solved the problem. ---
**Author:** ![subash955128](https://avatars.discourse-cdn.com/v4/letter/s/a87d85/32.png) [@subash955128](https://gromacs.bioexcel.eu/u/subash955128)\ **Post date:** [March 9, 2024, 11:04am UTC](https://gromacs.bioexcel.eu/t/install-networkx-package-version-1-11/763/12 "2024-03-09T11:04:32Z")
how do you solve could you share. i have same problem