How do I fix this error :"Group referenced in the .mdp file was not found in the index file." ? when running grompp on gromacs?

When I run grompp in gromacs to generate tpr file, I get this error :"Group  referenced in the .mdp file was not found in the index file.". These are my .mdp file and my index.ndx file. This is...

10 October 2018 7,624 0 View