# Ions not added

**URL:** <https://gromacs.bioexcel.eu/t/ions-not-added/3674>\
**Category:** User discussions\
**Created:** [February 15, 2022, 6:05pm UTC](https://gromacs.bioexcel.eu/t/ions-not-added/3674 "2022-02-15T18:05:15Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![mkak](https://avatars.discourse-cdn.com/v4/letter/m/ecb155/32.png) [@mkak](https://gromacs.bioexcel.eu/u/mkak)\
**Post date:** [February 15, 2022, 6:05pm UTC](https://gromacs.bioexcel.eu/t/ions-not-added/3674/1 "2022-02-15T18:05:15Z")

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GROMACS version:  
GROMACS modification: Yes  
Here post your question Command line:  
gmx genion -s ions.tpr -o solv\_ions.gro -p topol.top -pname NA -nname CL -neutral

Reading file ions.tpr, VERSION 2020.1-Ubuntu-2020.1-1 (single precision)  
Reading file ions.tpr, VERSION 2020.1-Ubuntu-2020.1-1 (single precision)  
No ions to add, will just copy input configuration.  
Please help me to resolve the problem

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**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:** [February 15, 2022, 6:35pm UTC](https://gromacs.bioexcel.eu/t/ions-not-added/3674/2 "2022-02-15T18:35:09Z")

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If `genion` does not add ions, that means the system was already neutral.