Dear David van der Spoel, Would you please elaborate on the details? I didn’t underestand about “remove = sign” thanks in advans, Afsaneh Maleki -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://maillist.sys.kth.se/pipermail/gromacs.org_gmx-users/attachments/20100107/91d8e2d9/attachment.html>