Hi, I've been trying to install the package "srl_people_tracker_0.2" found from "http://www.ros.org/browse/details.php?name=srl_people_tracker_0.2" for several days. Unfortunately, I have not yet got got it installed in my local machine. These are my tweaks and their corresponding output: shah@shah-laptop:~/Downloads$ svn co http://svn.mech.kuleuven.be/repos/orocos/trunk/kul-ros-pkg/srl_people_tracker_0.2/ A    srl_people_tracker_0.2/manifest.xml A    srl_people_tracker_0.2/CMakeLists.patch A    srl_people_tracker_0.2/CMakeLists.txt A    srl_people_tracker_0.2/Makefile Checked out revision 32522. shah@shah-laptop:~/Downloads$ cd srl_people_tracker_0.2/ shah@shah-laptop:~/Downloads/srl_people_tracker_0.2$ ls CMakeLists.patch  CMakeLists.txt  Makefile  manifest.xml shah@shah-laptop:~/Downloads/srl_people_tracker_0.2$ cmake . -- The C compiler identification is GNU -- The CXX compiler identification is GNU -- Check for working C compiler: /usr/bin/gcc -- Check for working C compiler: /usr/bin/gcc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Check for working CXX compiler: /usr/bin/c++ -- Check for working CXX compiler: /usr/bin/c++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done CMake Error at CMakeLists.txt:4 (add_subdirectory):   add_subdirectory given source "srl_source" which is not an existing   directory. -- Configuring incomplete, errors occurred! It seems that it was complaining about "srl_source" but I've given so many tries by replacing the term "srl_source" with my "srl_people_tracker_0.2" directory which is /home/shah/Downloads/srl_people_tracker_0.2. Any help is highly appreciated.. Regards, Shahmi