Ahh, yes perhaps i was unclear. The output file also has the same number of steps.
Checking file md50_centered.xtc Reading frame 0 time 0.000 # Atoms 27392 Precision 0.001 (nm) Last frame 50000 time 100000.000 Item #frames Timestep (ps) Step 50001 2 Time 50001 2 Lambda 0 Coords 50001 2 Velocities 0 Forces 0 Box 50001 2 The simulation is of a pure lipid bilayer, so the result of the centering option is that 99.9% of output frames have the lipid tales centered in the box while the 0.1% of frames seem not to be centered with the water at the center of the box. -- View this message in context: http://gromacs.5086.x6.nabble.com/trjconv-center-problem-tp5007473p5007479.html Sent from the GROMACS Users Forum mailing list archive at Nabble.com. -- gmx-users mailing list gmx-users@gromacs.org http://lists.gromacs.org/mailman/listinfo/gmx-users * Please search the archive at http://www.gromacs.org/Support/Mailing_Lists/Search before posting! * Please don't post (un)subscribe requests to the list. Use the www interface or send it to gmx-users-requ...@gromacs.org. * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists