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.