Hi, I got it from debs and got binaries but I am trying to modify some sources in there and I cannot even build unmodified version of it. - Eigen 3 seems like installed. The command you gave returned: kadir@kfuKovan:/tmp$ roscd eigen3 && cat Makefile | grep TAR | grep build TARBALL = build/eigen3.0-beta2.tar.bz2 Thanks for your advice. I am starting to look at perception pcl from now on. -- View this message in context: http://ros-users.122217.n3.nabble.com/Problem-while-compiling-pcl-tutorials-tp2116154p2116550.html Sent from the ROS-Users mailing list archive at Nabble.com.