Float32MultiArray in pub/sub example

edit

Hello ROS people,

so basically, I am simply trying to reproduce a simple C++ pub/sub example using the Float32MultiArray type. Here are the codes :

SUBSCRIBER

#include "ros/ros.h"
#include "std_msgs/String.h"
#include "std_msgs/Float32MultiArray.h"
void subscriberCallback(const std_msgs::Float32MultiArray::ConstPtr& test)
{
for(int i=0; i<5;i++){
    ROS_INFO("I heard %d: %f\n", i, test->data[i]);
}}
int main(int argc, char **argv){
 ros::init(argc, argv, "subscriber");
 ros::NodeHandle n;
 ros::Subscriber sub = n.subscribe("subscriber_topic", 1000, subscriberCallback);
 ros::spin();
 return 0;
 }

PUBLISHER

#include <stdio.h>
#include "ros/ros.h"
#include "std_msgs/Float32MultiArray.h"
int main(int argc, char **argv){
ros::init(argc, argv, "publisher");
ros::NodeHandle n;
ros::Publisher pub = n.advertise<std_msgs::Float32MultiArray>("subscriber_topic", 10);
ros::Rate rate(10);
while (ros::ok()){
std_msgs::Float32MultiArray data;
for(int i=0;i<5;i++){data.data[i]=i;}
pub.publish(data);
ros::spinOnce();
rate.sleep();
}
return 0;
}

1- The catkin_make build gives no error at all.

2- If I launch the subscriber node and publish on the terminal to subscriber_topic F32MA data, everything goes fine, which means the problem is from the publisher side.

3- When launching the publisher node, here is the error (exit code -11 ? searched and didn't find anything around that) - couldn't put a screen -

SUMMARY
========

PARAMETERS
* /rosdistro: melodic
* /rosversion: 1.14.13

NODES
/
publisher (publisher/publisher)

ROS_MASTER_URI=http://localhost:11311

process[publisher-1]: started with pid [1332]
[publisher-1] process has died [pid 1332, exit code -11, cmd 
/home/lilialkalee/f32ma/devel/lib/publisher/publisher __name:=publisher 
__log:=/home/lilialkalee/.ros/log/ab233984-352b-11ee-accc-00155dae808d/publisher-1.log].
log file: /home/lilialkalee/.ros/log/ab233984-352b-11ee-accc-00155dae808d/publisher-1*.log
all processes on machine have died, roslaunch will exit
shutting down processing monitor...
... shutting down processing monitor complete
done

Btw, when I look for the log given with the path /home/lilialkalee/.ros/log/ab233984-352b-11ee-accc-00155dae808d/publisher-1.log, the publisher-1.log cannot be found xD

So, any clues ? and thanks in advance.