Dear all, I have updated the minimum Python version requirement from 2.3 to 2.5 in the user manual and on the website (http://www.nmr-relax.com/download.html). This is needed as relax can no longer run on Python 2.3 and 2.4. If someone is interested it shouldn't be too hard to get these Python versions functional again using the 'compat' relax module. However they are so old that I do not believe that anyone would ever use relax with such ancient Python versions. Though I have seen some of these http://en.wikipedia.org/wiki/SGI_O2 still in labs around the world, so maybe this assumption is not safe. Regards, Edward