Where to find the log data file

[thebox-ujt]

roslaunch dvs_tracking flyingroom.launch auto_trigger:=true

When I tried to run the EVO sample program with the above command, the following error occurred during the program and the GUI has been terminated：

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=REQUIRED process [dvs_tracking-7] has died! process has died [pid 16903, exit code -8, cmd /home//catkin_ws/devel/lib/dvs_tracking/dvs_tracking_ros events:=/dvs/events remote_key:=/evo/remote_key pointcloud:=dvs_mapping/pointcloud __name:=dvs_tracking __log:=/home//.ros/log/5a3307c8-ef6b-11eb-886b-080027963547/dvs_tracking-7.log]. log file: /home/***/.ros/log/5a3307c8-ef6b-11eb-886b-080027963547/dvs_tracking-7.log Initiating shutdown!

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Among the error sentences, it says: "log file: /home/***/.ros/log/5a3307c8-ef6b-11eb-886b-080027963547/dvs_tracking-7.log",therfore, investigating on logdata seems necessary, however, I wasn't able to recognize the logdata file in the folder. My searching result is as follows;

@-VirtualBox:~/.ros/log/5a3307c8-ef6b-11eb-886b-080027963547$ ls master.log rosout-1-stdout.log rqt_evo-11.log svo_gui-3-stdout.log trigger_map_expansion-6.log pose_to_tf-4.log rosout.log rviz-13-stdout.log svo_gui-3.log roslaunch-****-VirtualBox-16863.log rqt_evo-11-stdout.log snakify-10.log tf_to_camera_marker-9.log

ISSUE: Could you show me where to find the logdata file?

Thank you,