Hi Ed (and all the others who read this), I've just installed relax-1.2.5. on my machine (Linux PC running redhat). When I try starting the programup by typing ./relax --test in the relax-1.2.5 directory, I get the following error message: ./relax --test Traceback (most recent call last): File "./relax", line 70, in ? from io import IO File "/home/h.schirra/relax-1.2.5/io.py", line 36, in ? from os import F_OK, access, devnull, makedirs, remove, stat ImportError: cannot import name devnull Is that a relax issue, or do I have to kick our IT people because there's something dodgy with python going on? Btw - versions up to 1.2.3 run fine on the machine. relax-1.2.4 gives the same error. Cheers, Horst Joachim ---------------------------------------------------------------- / Dr. sc. nat. Horst Joachim Schirra Phone: (+61)7/3346-2021 / / Queensland Smart State Fellow Fax: (+61)7/3346-2101 / / Institute for Molecular Bioscience / / University of Queensland email: h.schirra@xxxxxxxxx / / Brisbane QLD 4072, Australia http://www.uq.edu.au/~uqhschir / ----------------------------------------------------------------