Tabletop does not detect the table

Hello, I’m currently doing your ROS perception course. I have problems in Unit 4 “Surface and Object Recognition”. The first example does not run well. Table top does not detect the table.
The code I’m using is available here.

Could someone help me?


I’m affraid tabletop is not a very robust system to get surfaces. Its in the course because it was the best at the time, but its not perfect for sure.