I got the a99SB-disp forcefield with tip4pd.itp as the water model.
The a99SB-disp.ff file has been copied: "/usr/local/gromacs/share/gromacs/top/a99SB-disp.ff" The tip4pd.itp file has also been copied to "/usr/local/gromacs/share/gromacs/top" However using "-water tip4pd" in "pdb2gmx" will cause error: Error in user input: Invalid command-line options In command-line option -water Invalid value: tip4pd So how can I properly use the tip4pd in "pdb2gmx"? -- Gromacs Users mailing list * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before posting! * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists * For (un)subscribe requests visit https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or send a mail to gmx-users-requ...@gromacs.org.