I am running Redhat 7.0 on an AMD Athlons CPU. As for the checksum I am investigating now. Thanks for any help you can give. Renee Olano -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://maillist.sys.kth.se/pipermail/gromacs.org_gmx-users/attachments/20011129/a272c865/attachment.html>