Hi all I was following the manual to install ros on Ubuntu 16.04 http://emanual.robotis.com/docs/en/platform/turtlebot3/pc_setup/#pc-setup When I reach this command : cd ~/catkin_ws && catkin_make I get this error Base path: /home/basma/catkin_ws Source space: /home/basma/catkin_ws/src Build space: /home/basma/catkin_ws/build Devel space: /home/basma/catkin_ws/devel Install space: /home/basma/catkin_ws/install #### #### Running command: "make cmake_check_build_system" in "/home/basma/catkin_ws/build" #### #### #### Running command: "make -j4 -l4" in "/home/basma/catkin_ws/build" #### [ 0%] Built target std_msgs_generate_messages_lisp [ 0%] Built target sensor_msgs_generate_messages_lisp [ 0%] Built target _turtlebot3_msgs_generate_messages_check_deps_Sound [ 0%] Built target _turtlebot3_msgs_generate_messages_check_deps_PanoramaImg [ 0%] Built target _turtlebot3_msgs_generate_messages_check_deps_TakePanorama [ 0%] Built target _turtlebot3_msgs_generate_messages_check_deps_SensorState [ 0%] Built target sensor_msgs_generate_messages_py [ 0%] Built target std_msgs_generate_messages_py [ 0%] Built target _turtlebot3_msgs_generate_messages_check_deps_SetFollowState [ 0%] Built target sensor_msgs_generate_messages_eus [ 0%] Built target _turtlebot3_msgs_generate_messages_check_deps_VersionInfo [ 0%] Built target sensor_msgs_generate_messages_cpp [ 0%] Built target std_msgs_generate_messages_eus [ 0%] Built target std_msgs_generate_messages_cpp [ 0%] Built target sensor_msgs_generate_messages_nodejs [ 1%] Building CXX object my_first_pkg/CMakeFiles/hello_node.dir/src/hello.cpp.o [ 1%] Built target std_msgs_generate_messages_nodejs /home/basma/catkin_ws/src/my_first_pkg/src/hello.cpp:2:21: fatal error: ros/ros.h: No such file or directory compilation terminated. [ 1%] Built target diagnostic_msgs_generate_messages_lisp [ 1%] Built target geometry_msgs_generate_messages_cpp [ 1%] Built target geometry_msgs_generate_messages_eus [ 1%] Built target geometry_msgs_generate_messages_lisp [ 1%] Built target geometry_msgs_generate_messages_nodejs my_first_pkg/CMakeFiles/hello_node.dir/build.make:62: recipe for target 'my_first_pkg/CMakeFiles/hello_node.dir/src/hello.cpp.o' failed make[2]: *** [my_first_pkg/CMakeFiles/hello_node.dir/src/hello.cpp.o] Error 1 CMakeFiles/Makefile2:1625: recipe for target 'my_first_pkg/CMakeFiles/hello_node.dir/all' failed make[1]: *** [my_first_pkg/CMakeFiles/hello_node.dir/all] Error 2 make[1]: *** Waiting for unfinished jobs.... [ 1%] Built target geometry_msgs_generate_messages_py [ 1%] Built target roscpp_generate_messages_nodejs [ 1%] Built target roscpp_generate_messages_lisp Makefile:138: recipe for target 'all' failed make: *** [all] Error 2 Invoking "make -j4 -l4" failed Can anybody help me??? --- [Visit Topic](https://discourse.ros.org/t/invoking-make-j4-l4-failed/4332/1) or reply to this email to respond. If you do not want to receive messages from ros-users please use the unsubscribe link below. If you use the one above, you will stop all of ros-users from receiving updates. ______________________________________________________________________________ ros-users mailing list ros-users@lists.ros.org http://lists.ros.org/mailman/listinfo/ros-users Unsubscribe: