Hi all， When I use acc_grps (e.g.: SOL), I think I should not use com motion removal on that group, even the whole system. Am I right? Thanks -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://maillist.sys.kth.se/pipermail/gromacs.org_gmx-users/attachments/20070912/86d3f395/attachment.html>