I have noticed that fftw has recently been updated from major version 2 to major version 3. It seems the update stems from the mother distribution from RedHat. AFAIK, there are changes to the API in fftw version 3, which may give problems with 3rd party packages. Has anyone got experience with this? And any advice to offer? Cheers, Morten -- Morten Kjeldgaard, Asc. professor, Ph.D. Department of Molecular Biology, Aarhus University Gustav Wieds Vej 10 C, DK-8000 Aarhus C, Denmark Lab +45 89425026 * Mobile +45 51860147 * Fax +45 86123178 Home +45 86188180 * http://www.bioxray.dk/~mok