Exercise 5.2 launch file

Course Support Mastering with ROS - Turtlebot3
1

Hello!
when launch this file i am getting the error:
start_find_object_3d_session.launch

[ INFO] [1672511797.356383985]: object_prefix = object
[ERROR] (2022-12-31 18:36:37.358) Invalid session file (should be *.bin): “/home/user/catkin_ws/src/my_object_recognition_pkg/saved_pictures/ball_session.bin”
[ERROR] [1672511797.358994276]: Failed to load session “/home/user/catkin_ws/src/my_object_recognition_pkg/saved_pictures/ball_session.bin”
From where i will get this ball_session.bin
Thanks

2

This should have been created at some point earlier in the course. Did you follow the course from the beginning without skipping some parts?