Laser_assemble for Hokuyo scans in Gazebo

Hi everyone! I'm trying to assemble some readings from a Hokuyo laser simulated in gazebo. The assembler I'm trying to use is the one you can download here: https://github.com/ros-perception/laser_assembler Once I have downloaded and catkin_maked it, I run the gazebo simulation, which publish the topic /mybot/laser/scan with the planar scan. I can perfectly visualize that scan in rviz by setting the fixed frame to a topic called "odom" and adding a LaserScan with the /mybot/laser/scan topic. Then, I create the following launch file called "hokuyo_assembler.launch": but when I try in a new terminal "roslaunch laser_assembler hokuyo_assembler.launch", it does not publish any new topic, it only says the following: SUMMARY PARAMETERS * /laser_scan_assembler/fixed_frame: odom * /laser_scan_assembler/ignore_laser_skew: True * /laser_scan_assembler/max_scans: 400 * /laser_scan_assembler/tf_cache_time_secs: 10.0 * /rosdistro: kinetic * /rosversion: 1.12.7 NODES / laser_scan_assembler (laser_assembler/laser_scan_assembler) ROS_MASTER_URI=http://localhost:11311 core service [/rosout] found process[laser_scan_assembler-1]: started with pid [13103] [ INFO] [1501870597.118463994]: TF Cache Time: 10.000000 Seconds [ INFO] [1501870597.122609645]: Max Scans in History: 400 [ INFO] [1501870597.128738188]: Fixed Frame: odom Any idea of how can I create the topic with the assembled scans? Thanks in advance.