[ros-users] no matching function for call to ‘ros::NodeHandle::subscribe...

[Martin, L]

Hi,

I am a ROS newbie  and I was trying to compile the following code: 

class CloudToPCDFile{
public:
  ros::NodeHandle n_;
  message_filters::Subscriber<sensor_msgs::PointCloud> laser_sub_;
  CloudToPCDFile(ros::NodeHandle n) :
	 n_(n)
    {
	  laser_sub_=n_.subscribe("/ptu_46/assembled_cloud", 100, scanCallback);
    }

  void scanCallback (const sensor_msgs::PointCloudConstPtr& scan_in)
  {
	  //Dummy
  }
};

int main(int argc, char** argv)
{
  ros::init(argc, argv, "cloud_to_pcd_file");
  ros::NodeHandle n;
  CloudToPCDFile lstopc(n);
  ros::spin();
  return 0;
}


however, I unfortunately get the following error:
 error: no matching function for call to ‘ros::NodeHandle::subscribe(const
char [24], int, <unresolved overloaded function type>)’

any idea what I could be doing wrong? 

many thanks!

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