Problem with converting ros2 bag file?

[ZvonimirKoprivnjak]

I have topic name /vrpn_mocap/ASTRO/pose from optitrack which I record with ros2 bag record. When I try to covert this bag file with the data type .db3 to csv I receive an error, but when I record the topic name /joint_states with bag record and then convert it to csv it works perfectly. What could be the problem?

[JianKangEgon]

The problem might be the topic name separated by "/". The script saves the .csv file under the path "current folder + /${topic_name}.csv", if you don't have the permission to create new folder under current path, there will be error