Hi all Would you please let m eknow f we use 'genconf' after that we must use 'genbox' before applying 'grompp'? Thanks Regards Saly -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://maillist.sys.kth.se/pipermail/gromacs.org_gmx-users/attachments/20120311/bf206af8/attachment.html>