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check your CMakeLists.txt and make sure you have actionlib and actionlib_msg in both catkin_package and find_package macro's

Also make sure that in your package.xml file you have <build_depend>actionlib</build_depend> <run_depend>actionlib</run_depend> <build_depend>actionlib_msgs</build_depend> <run_depend>actionlib_msgs</run_depend>

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