Hi, Say your initial mdrun command for 30 ns were as follow grompp_mpi -c npt.gro -p topol.top -n index.ndx -t npt.cpt -o md_0_1.tpr and mdrun_mpi -deffnm md_0_1
Then you should get the files such as md_0_1.xtc, md_0_1.log, md_0_1.edr, md_0_1.cpt, md_0_1.trr and so on Then you obtain a new tpr file say new_100ns.tpr using tpbconv or gmx convert with appropriate flags. . Now, if you want to extend your simulation by a certain amount of time and want all your previous files appended the exact command should be something like mdrun_mpi -s new_100ns.tpr -v -deffnm md_0_1 -cpi md_0_1.cpt -append I did it once and coordinates were saved from 0ns all the way to 100ns and the same md_0_1.xtc, md_0_1.edr etc files were apeended without any difficulty. I am not quite sure but there's no harm in trying. Cheers, Soumadwip -- 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.