Hi Fred, > Do you have an url where I can find updated version of these scripts in order > to start playing. No, that looks like the right place (which still does not explain where that line you quoted came from, maybe better to mention the filename and line number?). In general, however, it is better and easier (in the long run) to check out the cvs repository. The files you are using are maintained in a source code control system called 'cvs'. If you happen to have a UNIX based OS, you are ready to use cvs. There are tools for windows as well, but the last reports (9 months ago) indicated they do not work with the cvs at bioinformatics.org. You can find instructions on how to use cvs at: http://sourceforge.net/docman/display_doc.php?docid=14033&group_id=1 On my box I can just type: cvs -z3 -d:ext:nicost@bioinformatics.org:/cvsroot co biophp and I will be prompted for my password (note that the environment variable 'CVS_RSH' should be set to 'ssh'). You'll need an account at bioinformatics.org for this to work (just request one using their webinterface, anonymous checkout is also possible), and - to be able to put your changes back into the repository - you will need write access as well (which Sean can grant you). Hope you are not overwhelmed. Best, Nico