Hello im testing on th sample QR code on the ros wiki page. but when i display the image the node just crashes. giving this error message

SUMMARY

PARAMETERS * /rosdistro: indigo * /rosversion: 1.11.13 * /visp_auto_tracker/debug_display: True * /visp_auto_tracker/model_name: pattern * /visp_auto_tracker/model_path: /home/farhan/catk...

NODES / visp_auto_tracker (visp_auto_tracker/visp_auto_tracker)

ROS_MASTER_URI=http://localhost:11311

core service [/rosout] found process[visp_auto_tracker-1]: started with pid [26753] DEF fst_0 Group { children [

Object "cube"

Shape {

geometry DEF cube IndexedFaceSet {

coord Coordinate { point [ -0.0765 -0.0765 0.000 0.0765 -0.0765 0.000 0.0765 0.0765 0.000 -0.0765 0.0765 0.000 -0.03825 -0.03825 0.000
0.03825 -0.03825 0.000 0.03825 0.03825 0.000 -0.03825 0.03825 0.000 ] }

coordIndex [ 0,1,2,3,-1, 4,5,6,7,-1, ]} }

] }

starting tracker ** Parsing XML for Mb Edge Tracker ** ecm : mask : size : 5 ecm : mask : nb_mask : 180 ecm : range : tracking : 10 ecm : contrast : threshold 5000 ecm : contrast : mu1 0.5 ecm : contrast : mu2 0.5 sample : sample_step : 4 sample : n_total_sample : 250 klt : Mask Border : 0 klt : Max Features : 10000 klt : Windows Size : 5 klt : Quality : 0.05 klt : Min Distance : 20 klt : Harris Parameter : 0.01 klt : Block Size : 3 klt : Pyramid Levels : 3 face : Angle Appear : 75 face : Angle Disappear : 75 camera : u0 : 192 (default) camera : v0 : 144 (default) camera : px : 600 (default) camera : py : 600 (default) [visp_auto_tracker-1] process has died [pid 26753, exit code -11, cmd /home/farhan/catkin_ws/devel/lib/visp_auto_tracker/visp_auto_tracker /visp_auto_tracker/camera_info:=/creative_cam/camera_info /visp_auto_tracker/image_raw:=/creative_cam/image_raw __name:=visp_auto_tracker __log:=/home/farhan/.ros/log/65c8e74e-18bf-11e5-8604-d8fc9361bda4/visp_auto_tracker-1.log]. log file: /home/farhan/.ros/log/65c8e74e-18bf-11e5-8604-d8fc9361bda4/visp_auto_tracker-1.log all processes on machine have died, roslaunch will exit shutting down processing monitor... ... shutting down processing monitor complete

Thanks Farhan