I'm getting "Fatal error: Residue 'UNK' not found in residue topology database." how to rectify?

I've a new ligand and named it as 'UNK' in pdb file. While generating the ligand topology through GROMACS by following its protein-ligand tutorial. I'm getting this fatal error: " Residue 'UNK'...

02 January 2020 5,593 10 View