Dear Bruce, Denis Thank you for the quick (and simple, once you know what to look for) solution - it was indeed a locale problem. I managed to sort it out, I don't mind setting the LC_Numeric to en_US system-wide (it's something I wanted to do anyway), but now I'm getting other locale errors and warnings whenever I start a new terminal session. Anyway, this is not a demeter issue, so I won't be bothering you with it. As for the installation, when I wrote I downloaded from the github repo, what I meant was I issued the following command in terminal: git clone https://github.com/bruceravel/demeter.git That's why it worked without the errors in the ./Build test step this time. Once again, thanks for your help! Kind regards, Stevan Ognjanovic -- Stevan Ognjanovic, Dipl.-Ing. Nanoparticle Process Technology Department of Engineering Sciences University Duisburg-Essen Lotharstraße 1, MA 349 D-47057 Duisburg Phone: +49 (0)203 379 1783 Mobile phone: +49 (0)157 3820 6890 Fax: +49 (0)203 379 4453 web: www.nppt.de e-mail: stevan.ognjanovic@uni-due.de