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Dear Peter, >I know there have been discussions regarding this, >however could someone summarize the issues involved >with installing and running spm on a Linux box. Both Matlab 4 and 5 run stable under Linux. Both are linked against older C libraries (libc5). Newer distributions(Redhat 5.x, SuSE 6.0) are based on libc6 (glibc) BUT also include older libraries. Under these distributions you need to be careful to link mex files against libc5 and not the default libc6. The Mathworks have a good technical report page which can be found using the search item "redhat". Our own experience is very encouraging. However we have not tested enormous fixed effects analyses (>4000 scans) under Linux. If images come from a SUN byte order needs to be swapped. The new SPM version will also run under Linux and we will provide mexed files for Linux. The latest kernel 2.2.1 improves performance by a better memory management and larger swapfiles. Both Matlab4 and 5 run stable under this kernel in conjunction with SuSE 6.0. SMP is now also supported properly. However we havn't excessively tested SMP with Matlab. I hope this helps Christian Dr Christian Büchel Functional Imaging Laboratory Wellcome Department of Cognitive Neurology 12 Queen Square London WC1N 3BG, UK Tel.:+44-171-833-7483 Fax.: +44-171-813-1420 email: [log in to unmask] %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%