Your solvent group size (41232) is not a multiple of 11

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1

GROMACS version:2019.4
GROMACS modification: Yes/NO
Hi I’m new in gromacs and I have been trying to add ions to the simulation box

using following command in gromacs :

  • gmx genion -s ions.tpr -o solv.gro -p topol.top -pname NA -nname CL -neutral

then I selected these groups(System): 0
This error was appeared:
Fatal error:
Your solvent group size (41232) is not a multiple of 11

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website at Common Errors — GROMACS webpage https://www.gromacs.org documentation