Zed Camera Problem

While run the code using ZED Camera and plugged to USB 3.0 of TX2
it shows

[ZED]ERROR: sl::Camera::Open has not been called, no Camera instance running.

this code working clearly
import pyzed.sl as sl

Usually we launch USB cameras through v4l2 on Jetson platforms. You can refer to

Jetson Nano FAQ
Q: I have a USB camera. How can I launch it on Jetson Nano?

For launching through 3rdparty app, would need other users to share experience.