# The solvent solvent group SOL is not continuous

**URL:** <https://gromacs.bioexcel.eu/t/the-solvent-solvent-group-sol-is-not-continuous/1453>\
**Category:** User discussions\
**Created:** [January 17, 2021, 6:40pm UTC](https://gromacs.bioexcel.eu/t/the-solvent-solvent-group-sol-is-not-continuous/1453 "2021-01-17T18:40:55Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sandovalelj](https://avatars.discourse-cdn.com/v4/letter/s/b77776/32.png) [@sandovalelj](https://gromacs.bioexcel.eu/u/sandovalelj)\
**Post date:** [January 17, 2021, 6:40pm UTC](https://gromacs.bioexcel.eu/t/the-solvent-solvent-group-sol-is-not-continuous/1453/1 "2021-01-17T18:40:55Z")

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GROMACS version:  
GROMACS modification: Yes/No  
Here post your question  
Hi!  
What would I do, I’ve receiving error ni gmx genion after I choose group of solvent molecules:

fatal error:  
The solvent group SOL is not continous: index[489]=5134, index[490]=5234

Can someone please help me.

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**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:** [January 18, 2021, 5:04pm UTC](https://gromacs.bioexcel.eu/t/the-solvent-solvent-group-sol-is-not-continuous/1453/2 "2021-01-18T17:04:02Z")

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Hi,

This post may help you

> [@The solvent group SOL is not continuous](https://gromacs.bioexcel.eu/t/the-solvent-group-sol-is-not-continuous/962):
>
> GROMACS version: 2018.1 GROMACS modification: Yes/No Hi, I would like to address a problem during a simulation of protein in ionic liquids. However, I have encountered an error where “The solvent group SOL is not continuous” during the gmx genion command. In this simulation, I plan to retain the water crystals from the protein PDB file. May I know what should I do to solve this error? The error is as below: Group 5 ( MainChain) has 1269 elements Group 6 ( MainChain+Cb) has …

Best regards  
Alessandra