I am doing a simulation of protein of my interest. I could run the simulation following the lysozyme tutorial. I am using 2018 version for gromacs. To start with, I ran the simulation for 1 ns. I want to run long simulation though want to make sure that each trajectory files has a manageable size. Thus, I would like to run simulation in 5 ns batches i.e. md_1.trr : 0-5ns md_2.trr: 5-10ns md_3.trr: 10-15ns like wise. I am wondering how to run simulation like this in a loop of 5ns. Any help would be highly appreciated. Best, Roli -- 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.