cannot open multiple Basler Pylon cameras in multiple processes

[astraw]

If I start one process with one Basler Pylon camera, I cannot start another process using an (unused) camera.

demo/simple-basler_pylon 0

This runs fine. Now, in a new console window

demo/simple-basler_pylon 1

And I get this error:

/home/astraw/src/motmot/libcamiface/src/cam_iface_basler_pylon.cpp (442): getting the camera: Failed to open/connect to Basler acA640-100gm#0030530FB50A#169.254.108.100:3956. Possibly, the device is controlled by another application.
GX status 0xe1018006
0:
/home/astraw/src/motmot/libcamiface/src/cam_iface_basler_pylon.cpp (513): getting the camera: Can't read from Register 0x0000000000030224. Access mode is NI

1:
/home/astraw/src/motmot/libcamiface/src/cam_iface_basler_pylon.cpp (513): getting the camera: Can't read from Register 0x0000000000030224. Access mode is NI