# Revision history [back]

I met with a problem when I tried to follow the tutorial http://wiki.ros.org/hector_quadrotor/Tutorials/Quadrotor%20outdoor%20flight%20demo At step ''catkin_make'', there is an error:

CMake Error at /opt/ros/kinetic/share/catkin/cmake/catkinConfig.cmake:83 (find_package): Could not find a package configuration file provided by "unique_id" with any of the following names:

unique_idConfig.cmake
unique_id-config.cmake


Add the installation prefix of "unique_id" to CMAKE_PREFIX_PATH or set "unique_id_DIR" to a directory containing one of the above files. If "unique_id" provides a separate development package or SDK, be sure it has been installed. Call Stack (most recent call first): geographic_info-master/geodesy/CMakeLists.txt:4 (find_package)

-- Configuring incomplete, errors occurred!

But I couldn't find ''unique_id'' in Github or other website. What can I do?