[Discuss-gnuradio] RuntimeError: Unable to find USRP #0

[Sebastiaan Heunis]

Hi

Can anyone please help me?  I am using gnuradio3.1.1.  I had no build
problems and it installed fine.  When I try to run
usrp_benchmark_usb.py, I get the a RuntimeError: Unable to find USRP
#0.  I don't think that the firmware gets downloaded to the USRP,
since the one light keeps on flashing quite fast.  When I issue

ls -lR /dev/bus/usb | grep usrp,

I get

crw-rw---- 1 root usrp 189, 516 Feb 20 17:59 005.

Thanks a lot.

Sebastiaan