Hi there, I've created a version management system for the project, using the tool subversion. Feel free to play and get used to work with it, I will probably re-create an official entry later, once everybody is used to this system. The repository is in /nas/biocomp/project/segal/java/svnroot but you should *never* edit this directory directly. Use the different subversion commands to get and update new code. See also the manual done by Francis & others on the biocomp wiki website. https://bioinformatics.psb.ugent.be/knowledge/wiki-bioinformatics/Version_Co... first create a directory to store the project files eg src. then "checkout" the project with the command: svn checkout file:////nas/biocomp/projects/segal/java/svnroot/modnet src this will copy all the "modnet" project files under src. the main code is in src/trunk cd src/trunk if you edit Split.java, make modifs and that you are happy with the results, you can "commit" the results: this will update the repository: svn commit Split.java -m "Revision test erbon" after -m is a comment. Do not commit .class files or other text files, only source code files. If you want to get the latest version of a file: svn update Split.java If you want to see all the logs for a file: svn log Split.java get a previous version: svn update -r <version number> Split.java you can get the version number by looking at the log for a given file.