Dear Justin, Thanks for your answer.
I know several programs have been renamed in new version such as pdb2gmx --> gmx pdb2gmx. But when I use gmx pdb2gmx, -bash: gmx: command not found Best, -- 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.