Hi Justin, Thanks for the effort to help me.
I still no out of the error. The following is the content of my topol_popc.top ; Include chain topologies #include "gromos53a6_lipid.ff/forcefield.itp" #include "popc.itp" ; Include water topology #include "gromos53a6_lipid.ff/spc.itp" ; Include ion topologies #include "gromos53a6_lipid.ff/ions.itp" ; System specifications [ system ] 128-Lipid POPC Bilayer [ molecules ] ; molecule name nr. POPC 128 SOL 2460 And the following is the first part of my popc128b.gro file Alm on surf + relaxed popc 14036 1POP C1 1 0.253 5.425 1.688 1POP C2 2 0.428 5.314 1.792 1POP C3 3 0.334 5.243 1.571 1POP N4 4 0.378 5.352 1.660 1POP C5 5 0.474 5.439 1.590 1POP C6 6 0.606 5.390 1.531 1POP O7 7 0.692 5.366 1.643 1POP P8 8 0.834 5.316 1.587 1POP O9 9 0.800 5.197 1.505 1POP O10 10 0.903 5.435 1.533 1POP O11 11 0.890 5.266 1.729 1POP C12 12 0.823 5.142 1.753 1POP C13 13 0.836 5.086 1.895 1POP O14 14 0.766 4.964 1.924 1POP C15 15 0.632 4.959 1.944 1POP O16 16 0.555 5.019 1.869 1POP C17 17 0.589 4.833 2.020 1POP C18 18 0.615 4.703 1.944 1POP C19 19 0.595 4.575 2.025 1POP C20 20 0.625 4.467 1.920 1POP C21 21 0.677 4.340 1.987 1POP C22 22 0.813 4.357 2.055 1POP C23 23 0.848 4.223 2.120 1POP C24 24 0.884 4.121 2.012 1POP C25 25 0.957 4.013 2.043 1POP C26 26 0.994 3.986 2.189 1POP C27 27 1.069 3.853 2.202 1POP C28 28 0.967 3.739 2.204 1POP C29 29 1.012 3.593 2.202 1POP C30 30 0.916 3.478 2.169 1POP C31 31 0.869 3.518 2.029 1POP C32 32 0.801 5.205 1.983 . . . . . What are the parts mismatching in these files? Since it says the atom names from the top file will be used, is it safe to ignore this warning too? Thanks, Peterson J -- View this message in context: http://gromacs.5086.n6.nabble.com/Error-in-Membrane-simulations-with-POPC-bilayer-tp4999161p4999354.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 * Only plain text messages are allowed! * 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