unable to save the ndt_mapping output

edit

I am trying to use ndt_mapping in Autoware 1.14.0 (Docker) on Ubuntu 18.04 (Melodic) with the ROSBAG Demo sample data(sample_moriyama_150324.bag).

I loaded the sample data in simulation tab and set the start time to 140, then clicked Play and Pause just after it had started playing.

And I clicked ndt_mapping check box in computing tab and clicked Pause again.

Finally, I clicked ndt_mapping app in computing tab, chose the directory and filename , and clicked PCD OUTPUT.

However, I can't find the pcd file any directory.

I appreciate it if you have any idea.

Thanks !