Update https://docs.google.com/file/d/0B6Qm4snFANimcmxYVnBOSkNCd2s/edit?usp=sharing
Seems I had to declare the atoms in .rtp with + and - when they are across periodic boundary. The new movie is showing that atoms do move, but not across the box. Yes, I would have to play a little ore with parameters for the system (ongoing work), but the major problem with PBC is sorted. I am giving below my new (working) molecule.rtp file, that is different from the earlier one - may be once this it may be helpful for someone;) Thanks! [ bondedtypes ] ; bonds angles dihedrals impropers 1 1 0 0 [ B21 ] ;# ldh21 [ atoms ] ; atomname atomtype charge chargegroup o1 oc18 -0.875 3 h1 hoy 0.350 3 o2 oc17 -0.875 3 h2 hoy 0.350 3 o3 oc20 -0.875 3 h3 hoy 0.350 3 o4 oc21 -0.875 1 h4 hoy 0.350 1 o5 oc16 -0.875 1 h5 hoy 0.350 1 o6 oc19 -0.875 1 h6 hoy 0.350 1 mg1 mg 1.40 0 al1 ac3 1.35 1 mg2 mg 1.40 0 o7 oc16 -0.875 2 h7 hoy 0.350 2 o8 oc19 -0.875 2 h8 hoy 0.350 2 o9 oc18 -0.875 1 h9 hoy 0.350 1 o10 oc17 -0.875 1 h10 hoy 0.350 1 o11 oc20 -0.875 1 h11 hoy 0.350 1 o12 oc21 -0.875 2 h12 hoy 0.350 2 mg3 mg 1.40 0 mg4 mg 1.40 0 al2 ac3 1.35 2 o13 oc20 -0.875 2 h13 hoy 0.350 2 o14 oc21 -0.875 3 h14 hoy 0.350 3 o15 oc16 -0.875 3 h15 hoy 0.350 3 o16 oc19 -0.875 3 h16 hoy 0.350 3 o17 oc18 -0.875 2 h17 hoy 0.350 2 o18 oc17 -0.875 2 h18 hoy 0.350 2 al3 ac3 1.35 3 mg5 mg 1.40 0 mg6 mg 1.40 0 [ bonds ] ; atom1 atom2 parametersindex o1 h1 b_oc-h o2 h2 b_oc-h o3 h3 b_oc-h o4 h4 b_oc-h o5 h5 b_oc-h o6 h6 b_oc-h o7 h7 b_oc-h o8 h8 b_oc-h o9 h9 b_oc-h o10 h10 b_oc-h o11 h11 b_oc-h o12 h12 b_oc-h o13 h13 b_oc-h o14 h14 b_oc-h o15 h15 b_oc-h o16 h16 b_oc-h o17 h17 b_oc-h o18 h18 b_oc-h al3 +o1 b_ac-oc al3 +o2 b_ac-oc al3 +o3 b_ac-oc o4 al1 b_ac-oc o5 al1 b_ac-oc o6 al1 b_ac-oc al2 -o7 b_ac-oc al2 -o8 b_ac-oc o9 al1 b_ac-oc o10 al1 b_ac-oc o11 al1 b_ac-oc o12 al2 b_ac-oc al2 -o13 b_ac-oc o14 al3 b_ac-oc o15 al3 b_ac-oc o16 al3 b_ac-oc o17 al2 b_ac-oc o18 al2 b_ac-oc [ angles ] ; ai aj ak gromos type al3 o14 h14 a_ac-oc-h al3 o15 h15 a_ac-oc-h al3 +o1 +h1 a_ac-oc-h al3 o16 h16 a_ac-oc-h al3 +o2 +h2 a_ac-oc-h al3 +o3 +h3 a_ac-oc-h al1 o4 h4 a_ac-oc-h al1 o5 h5 a_ac-oc-h al1 o9 h9 a_ac-oc-h al1 o6 h6 a_ac-oc-h al1 o10 h10 a_ac-oc-h al1 o11 h11 a_ac-oc-h al2 o12 h12 a_ac-oc-h al2 -o7 -h7 a_ac-oc-h al2 o17 h17 a_ac-oc-h al2 -o8 -h8 a_ac-oc-h al2 o18 h18 a_ac-oc-h al2 -o13 -h13 a_ac-oc-h o5 al1 o10 a_oc-ac-oc_1 -o7 al2 o18 a_oc-ac-oc_1 o15 al3 +o2 a_oc-ac-oc_1 o9 al1 o6 a_oc-ac-oc_1 o17 al2 -o8 a_oc-ac-oc_1 +o1 al3 o16 a_oc-ac-oc_1 o11 al1 o4 a_oc-ac-oc_1 -o13 al2 o12 a_oc-ac-oc_1 +o3 al3 o14 a_oc-ac-oc_1 o5 al1 o9 a_oc-ac-oc_2 -o7 al2 o17 a_oc-ac-oc_2 o15 al3 +o1 a_oc-ac-oc_2 o5 al1 o4 a_oc-ac-oc_2 -o7 al2 o12 a_oc-ac-oc_2 o15 al3 o14 a_oc-ac-oc_2 o10 al1 o6 a_oc-ac-oc_2 o18 al2 -o8 a_oc-ac-oc_2 +o2 al3 o16 a_oc-ac-oc_2 o10 al1 o11 a_oc-ac-oc_2 o18 al2 -o13 a_oc-ac-oc_2 +o2 al3 +o3 a_oc-ac-oc_2 o9 al1 o4 a_oc-ac-oc_2 o17 al2 o12 a_oc-ac-oc_2 +o1 al3 o14 a_oc-ac-oc_2 o6 al1 o11 a_oc-ac-oc_2 -o8 al2 -o13 a_oc-ac-oc_2 o16 al3 +o3 a_oc-ac-oc_2 o5 al1 o6 a_oc-ac-oc_3 -o7 al2 -o8 a_oc-ac-oc_3 o15 al3 o16 a_oc-ac-oc_3 o5 al1 o11 a_oc-ac-oc_3 -o7 al2 -o13 a_oc-ac-oc_3 o15 al3 +o3 a_oc-ac-oc_3 o10 al1 o9 a_oc-ac-oc_3 o18 al2 o17 a_oc-ac-oc_3 +o2 al3 +o1 a_oc-ac-oc_3 o10 al1 o4 a_oc-ac-oc_3 o18 al2 o12 a_oc-ac-oc_3 +o2 al3 o14 a_oc-ac-oc_3 o9 al1 o11 a_oc-ac-oc_3 o17 al2 -o13 a_oc-ac-oc_3 +o1 al3 +o3 a_oc-ac-oc_3 o6 al1 o4 a_oc-ac-oc_3 -o8 al2 o12 a_oc-ac-oc_3 o16 al3 o14 a_oc-ac-oc_3 -- View this message in context: http://gromacs.5086.x6.nabble.com/periodic-molecule-tp5011270p5011291.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