Number of coordinates in solv.gro does not match topology topol.top

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GROMACS version:2024.2
GROMACS modification: Yes/No
Here post your question While performing initial steps on molecular docking simulation using gromacs MD tutorials (protein-ligand) error occurred on adding ion steps .SHOWED AS

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Any help will be highly appreciateed.

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The title of your post “Number of coordinates in solv.gro does not match topology topol.top” is not the same error message as shown in the snapshot “No such moleculetype JZ4”.

Are you really following the tutorial? Or are you using your own system? Have you read the part of the user-guide linked in the message? Or more specifically Common errors when using GROMACS - GROMACS 2024.2 documentation?