Can't find the table

[AaronZhu2018]

After I run this code ./pr2_safe_spawner.sh
I just can see the pr2 robot both in gazebo and rviz, but i cannot see the table and item
I really follow all the step you mention in the file

[zenetio]

Based on the error message, your launch file is missing the pr2_cloud_transformer or there is a typo in the ros launch file.

[AaronZhu2018]

Finally, I fix error by see this http://answers.gazebosim.org/question/21077/loading-a-urdf-file-from-a-world-plugin-gazebo-without-ros/?fbclid=IwAR09c7SdXu7bsysayYzXPepBeU-STFw2_M9aU3g4Ho1-w_EDWo6XycDkLt0
Then I stuck in new problem. After I run roslaunch pr2_robot pick_place_project.launch
This time everything is on the table. But the robot didn't go to catch them
why this happen? I think there is already a motion planner in this project