The error message explicitly tells you what is wrong: "Expected 2 elements for wall_atomtype, found 0"
And looking in your .mdp file ... ;WALLS ; Number of walls, type, atom types, densities and box-z scale factor for Ewald nwall = 2 wall_type = 9-3 wall_r_linpot = -1 wall_atomtype = wall_density = wall_ewald_zfac = 3 On the wall_atomtype line, you have defined zero elements and you should have two. Catch ya, Dr. Dallas Warren Department of Pharmaceutical Biology and Pharmacology Pharmacy and Pharmaceutical Sciences, Monash University 381 Royal Parade, Parkville VIC 3010 dallas.war...@pharm.monash.edu.au +61 3 9903 9167 --------------------------------- When the only tool you own is a hammer, every problem begins to resemble a nail. _______________________________________________ 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 gmx-users-requ...@gromacs.org. Can't post? Read http://www.gromacs.org/mailing_lists/users.php