Hi , You run extended simulation of 10 ns on your first 10ns simulation . You get traj20ns.xtc. these new trajectory contain all the tme frame from onwards 10ns. So if you are giving command
trjconv –f traj20ns.xtc –s topol.tpr –b 10000 –e 10000 –o snapshot20ns.gro (Note: traj20ns.xtc is not a full trajectory, it just a trajectory of second 10ns simulation) with traj20ns.xtc if you need 20 ns snapshot use -b 20000 -e 20000 With Best Wishes, Rama David
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