[Olena-bugs] milena_one.cc:14:25: fatal error: tests/data.hh: No such file or directory

Helo epita, I trying to get running the olena on ubuntu in order to test SauvolaMs myself, but by compiling the"3.2 First generic algorithm" from the tutorial I am always getting the same error : milena_one.cc:14:25: fatal error: tests/data.hh: No such file or directory what I am doing wrong ? best regards Albert Berman