Dear Tsjerk Thanks for your reply.
I think that there is another problem, except for visualization. I obtained the Z coordinate (along the bilayer normal) of the center of mass of the 4 drug molecules (violet, blue, red and green lines) and DPPC lipid bilayer (black line) as a function of simulation time, using g_traj tool. The related figure is in following link: https://www.dropbox.com/s/op8gaxeto4z7qxq/figure.TIF?dl=0 This Figure is not normal and usual. What is your opinion about this issue? Best wishes, -- 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.