Hi Justin , i thought the same as you, that the problem is with the NDX file, but i check the selection, the file and made diferente gro files, in order to check the atoms, and there are ok , or fine ,
Andrés Ortega -- 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.