Dear Mr Troyer, I'm writing to you because I have some problems in the installation of ALPS on Ubuntu GNU/Linux 10.04 lucid. Following the instructions in the guide at http://alps.comp-phys.org/mediawiki/index.php/Download_and_install_ALPS_2#Do... I proceeded in the following manner: I openend a terminal and I typed curl http://www.cpht.polytechnique.fr/ubuntu/gpg_key / sudo apt-key add- I then added the two debs : deb http://www.cpht.polytechnique.fr/ubuntu lucid alps deb-src http://www.cpht.polytechnique.fr/ubuntu lucid alps to the file etc/apt/source.list then I typed sudo aptitude update sudo aptitude install alps2-all sudo aptitude upgrade sudo reboot I need to run classical MC simulations for Ising, XY, Heisenberg and O(4) model. I can do the simulations for the Ising, XY and Heisenberg models with the command spinmc --Tmin 100 --write-xml parm.in.xml and it seems to work...but I cannot run the simulation for the O(4) model that I know is already included in the newest version. Which mistake I made in the installation? It seems that I missed some steps also because I have some problems in other commands. For example the command convert2xml works but the command convert2text doesn't exist. can you tell me what I have to do ti install ALPS 2.0 on Ubuntu 10.04 lucid? Thank you very much for the help, with best regards Rachele Nerattini