/home/ubuntu/ros2_ws/src/beacon_positioning/src/tracker_position.cpp: In lambda function: /home/ubuntu/ros2_ws/src/beacon_positioning/src/tracker_position.cpp:119:61: error: invalid initialization of reference of type ‘const main(int, char**)::::anchor_data_t&’ from expression of type ‘const terabee::RtlsDevice::anchor_data_t’ 119 | for (const struct anchor_data_t &anchor : tracker_msg.anchors_data) | ^~~~~~~~~~~~ In file included from /opt/ros/foxy/include/rclcpp/client.hpp:40, from /opt/ros/foxy/include/rclcpp/callback_group.hpp:23, from /opt/ros/foxy/include/rclcpp/any_executable.hpp:20, from /opt/ros/foxy/include/rclcpp/memory_strategy.hpp:24, from /opt/ros/foxy/include/rclcpp/memory_strategies.hpp:18, from /opt/ros/foxy/include/rclcpp/executor_options.hpp:20, from /opt/ros/foxy/include/rclcpp/executor.hpp:33, from /opt/ros/foxy/include/rclcpp/executors/multi_threaded_executor.hpp:26, from /opt/ros/foxy/include/rclcpp/executors.hpp:21, from /opt/ros/foxy/include/rclcpp/rclcpp.hpp:146, from /home/ubuntu/ros2_ws/src/beacon_positioning/src/tracker_position.cpp:4: /home/ubuntu/ros2_ws/src/beacon_positioning/src/tracker_position.cpp:121:107: error: base operand of ‘->’ has non-pointer type ‘const main(int, char**)::::anchor_data_t’ 121 | RCLCPP_INFO(node->get_logger(), "anchor number= %d, distance = %f, x = %f, y = %f, z = %f", anchor->number, anchor->distance, anchor->pos_x, anchor->pos_y, anchor->pos_z); | ^~ /home/ubuntu/ros2_ws/src/beacon_positioning/src/tracker_position.cpp:121:123: error: base operand of ‘->’ has non-pointer type ‘const main(int, char**)::::anchor_data_t’ 121 | RCLCPP_INFO(node->get_logger(), "anchor number= %d, distance = %f, x = %f, y = %f, z = %f", anchor->number, anchor->distance, anchor->pos_x, anchor->pos_y, anchor->pos_z); | ^~ /home/ubuntu/ros2_ws/src/beacon_positioning/src/tracker_position.cpp:121:141: error: base operand of ‘->’ has non-pointer type ‘const main(int, char**)::::anchor_data_t’ 121 | RCLCPP_INFO(node->get_logger(), "anchor number= %d, distance = %f, x = %f, y = %f, z = %f", anchor->number, anchor->distance, anchor->pos_x, anchor->pos_y, anchor->pos_z); | ^~ /home/ubuntu/ros2_ws/src/beacon_positioning/src/tracker_position.cpp:121:156: error: base operand of ‘->’ has non-pointer type ‘const main(int, char**)::::anchor_data_t’ 121 | RCLCPP_INFO(node->get_logger(), "anchor number= %d, distance = %f, x = %f, y = %f, z = %f", anchor->number, anchor->distance, anchor->pos_x, anchor->pos_y, anchor->pos_z); | ^~ /home/ubuntu/ros2_ws/src/beacon_positioning/src/tracker_position.cpp:121:171: error: base operand of ‘->’ has non-pointer type ‘const main(int, char**)::::anchor_data_t’ 121 | RCLCPP_INFO(node->get_logger(), "anchor number= %d, distance = %f, x = %f, y = %f, z = %f", anchor->number, anchor->distance, anchor->pos_x, anchor->pos_y, anchor->pos_z); | ^~ make[2]: *** [CMakeFiles/tracker_position.dir/build.make:63: CMakeFiles/tracker_position.dir/src/tracker_position.cpp.o] Error 1 make[1]: *** [CMakeFiles/Makefile2:78: CMakeFiles/tracker_position.dir/all] Error 2 make: *** [Makefile:141: all] Error 2