> Dear all > I want to run grompp command for making .tpr file of > POPC+Protein.I've been using the ffgmx.itp,lipid.itp > and i've removed the lipid.itp of the > .top file, but it gives a fatal error : > Atomtype 'HC' not found! > Any help will be highly appreciated. I'm guessing HC will be defined in lipid.itp. Why take it out? Mark