No problem, Prasun. :) Just open conf.gro and see the last string there. Divide the least number by 2 and type it in the grompp.mdp as your new cutoff.
<The cut-off length is longer than half the shortest box vector or longer <than the smallest box diagonal element. Increase the box size or decrease >rvdw. -- Vitaly V. Chaban School of Chemistry National University of Kharkiv Svoboda sq., 4, Kharkiv 61077, Ukraine email: [EMAIL PROTECTED] skype: vvchaban _______________________________________________ gmx-users mailing list gmx-users@gromacs.org http://www.gromacs.org/mailman/listinfo/gmx-users Please search the archive at http://www.gromacs.org/search before posting! Please don't post (un)subscribe requests to the list. Use the www interface or send it to [EMAIL PROTECTED] Can't post? Read http://www.gromacs.org/mailing_lists/users.php