Gstnvarguscamerasrc.cpp, execute:521 No cameras available

Autonomous Machines Jetson & Embedded Systems Jetson TX2
3

thanks JerryChang,
my problem solved,

cd ~/
sudo mv /lib/modules/4.9.140-tegra/ /lib/modules/4.9.140
sudo reboot

reboot is very important,
Without the reboot, the problem will not be resolved.
thanks