subscriber's callback never called in c++, using morse

edit

Hi, I am running a simulation with Morse. tryin to get data from the robot with a C++ program using ROS.

The simulation is simple: a Quadrotor publishes its pose on a topic, and receives a navigation waypoint. The Morse file is:

from morse.builder import *

bee = Quadrotor()

waypoint = RotorcraftWaypoint()
bee.append(waypoint)
waypoint.add_stream('ros')

#The Quadrototor is called bee
beePose = Pose()
bee.append(beePose)
beePose.add_stream('ros', topic='/bee/pose')

#Environment
env = Environment('land-1/trees')

In the C++ program, the chatterCallback(...) is never called, while it should print the position of the Quadrorotor:

#include "ros/ros.h"
#include "geometry_msgs/Pose.h"
#include <sstream>

void chatterCallback(const geometry_msgs::Pose& msg)
{
        geometry_msgs::Point coord = msg.position;
        ROS_INFO("Current position: (%g, %g, %g)", coord.x, coord.y, coord.z);
}

int main(int argc, char **argv)
{
        ros::init(argc, argv, "plan_node");

/**
 * NodeHandle is the main access point to communications with the ROS system.
 */
        ros::NodeHandle n;

/**
 * The advertise() function is how you tell ROS that you want to
 * publish on a given topic name.
 */
        ros::Publisher motion = n.advertise<geometry_msgs::Pose>("/bee/waypoint", 1000);

        // subscribes to stream
        ros::Subscriber sub = n.subscribe("/bee/pose", 1000, chatterCallback);

        ros::spin();

        return 0;
}

While calling roswtf, I get the following error:

================================================================================
Static checks summary:

Found 1 warning(s).
Warnings are things that may be just fine, but are sometimes at fault

WARNING ROS_HOSTNAME may be incorrect: ROS_HOSTNAME [localhost] resolves to [::1], which does not appear to be a local IP address ['127.0.0.1', 'a.b.c'].
================================================================================
Beginning tests of your ROS graph. These may take awhile...
analyzing graph...
... done analyzing graph
running graph rules...
... done running graph rules

Online checks summary:

Found 1 error(s).

ERROR The following nodes should be connected but aren't:
 * /morse->/plan_node (/bee/pose)

The weird thing is that all the nodes are running on the same computer. No network connection problems... in theory.

Finally, I get the desired data when running on another terminal:

rostopic echo /bee/pose

Any advice?

Thanks