Michael, I have been modifying your GUI branch to launch the GUI from relax. All your code and pictures from file #7341 (https://gna.org/support/download.php?file_id=7341) attached to task #6847 (https://gna.org/task/?6847#comment4) is now committed to the SVN repository. So to launch the GUI, you can type any one of the following: $ relax -g bieri $ relax --gui bieri $ relax -b $ relax --bieri You can see all my changes on the relax-commits mailing list (https://mail.gna.org/public/relax-commits), which I would recommend you subscribe to so you can see all the changes occurring to your branch. Not all elements of the interface may work, but the GUI should launch independently of where relax is installed or where you run it from. If you haven't already, you can check out your branch by typing: $ svn co svn+ssh://michaelbieri@xxxxxxxxxxx/svn/relax/branches/bieri_gui Later on I will make lots of code cleanups/modification recommendations and suggestions for renaming of files and directories, as well as for reorganising the separate GUI elements into separate modules. For example increasing the comment count and clearly describing in human understandable terms what a statement or block of statements are doing (this is part of the design of relax so that non-programmers can understand and contribute). And using the standard relax variable, class, module etc. naming conventions. Regards, Edward