Structure sensor conflict with Raspberry camera


I’m using the sensor on a RaspBerry Pi 2 B.
I have a conflict between the raspberry camera and the openni2 that control the structure sensor.
It is quite easy to verify: try to run SimpleRead example program in one console window, then open another console window and run RaspiStill -d (for example). As the camera switch on the structure sensor switch off.
Any idea ?