Segmentation Fault

[GabrieleGalimberti-GaleSelector]

Hi,
when I run this command

roslaunch blam_example test_offline.launch

I obtain a Segmentation Fault exit -11 .
I have checked log files, launch file, classes of blam and debug code with gdb and comments, but I haven't finded nothing that can help me.
Please Help Me !!!!

... logging to /home/parallels/.ros/log/a2d9e9fe-1d27-11eb-ba47-001c4211f8f3/roslaunch-parallels-Parallels-Virtual-Platform-3307.log
Checking log directory for disk usage. This may take a while.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://parallels-Parallels-Virtual-Platform:36647/

SUMMARY

PARAMETERS

• /blam/blam_slam/check_for_loop_closures: True
• /blam/blam_slam/filename/bag: /home/parallels/c...
• /blam/blam_slam/filtering/decimate_percentage: 0.9
• /blam/blam_slam/filtering/grid_filter: True
• /blam/blam_slam/filtering/grid_res: 0.2
• /blam/blam_slam/filtering/outlier_filter: False
• /blam/blam_slam/filtering/outlier_knn: 10
• /blam/blam_slam/filtering/outlier_std: 1.0
• /blam/blam_slam/filtering/radius: 0.15
• /blam/blam_slam/filtering/radius_filter: False
• /blam/blam_slam/filtering/radius_knn: 3
• /blam/blam_slam/filtering/random_filter: True
• /blam/blam_slam/frame_id/base: base
• /blam/blam_slam/frame_id/fixed: world
• /blam/blam_slam/frame_id/odometry: odometry
• /blam/blam_slam/icp/corr_dist: 2.0
• /blam/blam_slam/icp/iterations: 10
• /blam/blam_slam/icp/max_rotation: 0.1
• /blam/blam_slam/icp/max_translation: 0.09
• /blam/blam_slam/icp/tf_epsilon: 1e-10
• /blam/blam_slam/icp/transform_thresholding: False
• /blam/blam_slam/init/orientation/pitch: 0.0
• /blam/blam_slam/init/orientation/roll: 0.0
• /blam/blam_slam/init/orientation/yaw: 0.0
• /blam/blam_slam/init/orientation_sigma/pitch: 0.02
• /blam/blam_slam/init/orientation_sigma/roll: 0.02
• /blam/blam_slam/init/orientation_sigma/yaw: 0.02
• /blam/blam_slam/init/position/x: 0.0
• /blam/blam_slam/init/position/y: 0.0
• /blam/blam_slam/init/position/z: 0.0
• /blam/blam_slam/init/position_sigma/x: 0.1
• /blam/blam_slam/init/position_sigma/y: 0.1
• /blam/blam_slam/init/position_sigma/z: 0.1
• /blam/blam_slam/localization/corr_dist: 1.0
• /blam/blam_slam/localization/iterations: 10
• /blam/blam_slam/localization/max_rotation: 0.1
• /blam/blam_slam/localization/max_translation: 0.05
• /blam/blam_slam/localization/tf_epsilon: 1e-10
• /blam/blam_slam/localization/transform_thresholding: False
• /blam/blam_slam/map/octree_resolution: 0.05
• /blam/blam_slam/max_tolerable_fitness: 0.15
• /blam/blam_slam/poses_before_reclosing: 40
• /blam/blam_slam/proximity_threshold: 1.5
• /blam/blam_slam/rate/estimate: 50.0
• /blam/blam_slam/rate/visualization: 0.5
• /blam/blam_slam/relinearize_skip: 1
• /blam/blam_slam/relinearize_threshold: 0.01
• /blam/blam_slam/scan_topic: velodyne_points
• /blam/blam_slam/skip_recent_poses: 40
• /blam/blam_slam/time_end: -1.0
• /blam/blam_slam/time_scale: -1.0
• /blam/blam_slam/time_start: 0.0
• /blam/blam_slam/translation_threshold: 0.5
• /rosdistro: melodic
• /rosversion: 1.14.9
• /use_sim_time: False

NODES
/blam/
blam_slam (blam_slam/blam_slam_offline)

auto-starting new master
process[master]: started with pid [3320]
ROS_MASTER_URI=http://localhost:11311

setting /run_id to a2d9e9fe-1d27-11eb-ba47-001c4211f8f3
process[rosout-1]: started with pid [3331]
started core service [/rosout]
process[blam/blam_slam-2]: started with pid [3338]
[blam/blam_slam-2] process has died [pid 3338, exit code -11, cmd /home/parallels/catkin_ws/devel/lib/blam_slam/blam_slam_offline __name:=blam_slam __log:=/home/parallels/.ros/log/a2d9e9fe-1d27-11eb-ba47-001c4211f8f3/blam-blam_slam-2.log].
log file: /home/parallels/.ros/log/a2d9e9fe-1d27-11eb-ba47-001c4211f8f3/blam-blam_slam-2*.log
^C[rosout-1] killing on exit
[master] killing on exit
shutting down processing monitor...
... shutting down processing monitor complete
done

What should I do?