Code running issue and example dataset inaccessible

[seungsang07]

Hello, author. Thank you for sharing your code.
I'm trying to run your code.
Currently, I can't access the example data, so I'm trying to run it by rewriting the yaml file to match the parameter reader code.
There's a problem where the callback function is not called after entering the callback function a few times.
Has this problem occurred before?
I tried configuring spin as a separate thread in mc_slam_app, but the SLAM code doesn't work properly.
I'd appreciate your help.