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publishing a vector of PointCloud2 vectors in ROS.

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Hi all, I have created a custom message for a vector of PointCloud2 with name clusterVector.msg, and inside that vector I have the following line: sensor_msgs/PointCloud2[] clusterClouds This message is inside one of my custom made packages Object_detection_module. Now I am trying to use this so I am doing the following: 1) I am declaring the header: object_detection_module/clusterVector.h 2) I am instantiating an object of that type: object_detection_module::clusterVectorConstPtr msg1; 3) I am trying to push_back a type 2 point cloud as follows: sensor_msgs::PointCloud2::Ptr test_message (new sensor_msgs::PointCloud2 ()); msg1->clusterClouds.push_back(test_message); Unfortunately, when I am trying to compile my code I get the following error: error: no matching function for call to ‘std::vector>, std::allocator>>>::push_back(sensor_msgs::PointCloud2_>::Ptr&) const’ /home/polychronis/catkin_workspace/src/object_detection_module/src/object_detection_class.cpp:100:46: note: candidates are: /usr/include/c++/4.6/bits/stl_vector.h:826:7: note: void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = sensor_msgs::PointCloud2_>, _Alloc = std::allocator>>, std::vector<_Tp, _Alloc>::value_type = sensor_msgs::PointCloud2_>] /usr/include/c++/4.6/bits/stl_vector.h:826:7: note: no known conversion for argument 1 from ‘sensor_msgs::PointCloud2_>::Ptr {aka boost::shared_ptr>>}’ to ‘const value_type& {aka const sensor_msgs::PointCloud2_>&}’ /usr/include/c++/4.6/bits/stl_vector.h:839:7: note: void std::vector<_Tp, _Alloc>::push_back(std::vector<_Tp, _Alloc>::value_type&&) [with _Tp = sensor_msgs::PointCloud2_>, _Alloc = std::allocator>>, std::vector<_Tp, _Alloc>::value_type = sensor_msgs::PointCloud2_>] /usr/include/c++/4.6/bits/stl_vector.h:839:7: note: no known conversion for argument 1 from ‘sensor_msgs::PointCloud2_>::Ptr {aka boost::shared_ptr>>}’ to ‘std::vector>, std::allocator>>>::value_type&& {aka sensor_msgs::PointCloud2_>&&}’ make[2]: *** [object_detection_module/CMakeFiles/object_detection_main.dir/src/object_detection_class.cpp.o] Error 1 make[1]: *** [object_detection_module/CMakeFiles/object_detection_main.dir/all] Error 2 make: *** [all] Error 2 Invoking "make" failed Any ideas what I am doing wrong? Any help would be greatly appreciated. Best, Akis

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