In http://www.ros.org/wiki/actionlib it should say rosbuild_find_ros_package(actionlib) include(${actionlib_PACKAGE_PATH}/cmake/actionbuild.cmake) genaction() And you could make a note that the .action file must not contain windows line ending characters. Otherwise the generated message header files are broken. -- ___________________________________________ REC GmbH Dr. Christian Verbeek Robert-Koch-Str. 2, 82152 Planegg Tel: +49 89 85689672 Fax: +49 89 85902327 Mobile: +49 160 7056589 e-mail: verbeek@servicerobotics.eu Geschäftsführer: Dr. Christian Verbeek Registergericht: AG München (HRB 154463) ____________________________________________