Dear Mr/Ms, I meet errors when use osmocom sink and source in GNU Radio, I have tried BladeRF and HackRF, and I use Ubuntu 16.04. 1.When I use BladeRF, I set the parameters as "bladerf=701c2ce1da297914cb29695ba79fac54,fpga=<'/Users/qiuyuexue/Documents/BladeRF/hostedx115-latest.rbf'>,fpga-reload=1,buffers=32,buflen=4096,transfers=16,stream_timeout_ms=3000,loopback=none,verbosity=silent,xb200.” and I got error as: “(top_block.py:4795): IBUS-WARNING **: The owner of /home/ceca_517/.config/ibus/bus is not root! gr-osmosdr v0.1.4-86-ge9dde9af (0.1.5git) gnuradio 3.7.10 built-in sink types: hackrf bladerf redpitaya file Opening nuand bladeRF with device identifier string: "*:serial=701c2ce1da297914cb29695ba79fac54" [bladeRF sink] Loading FPGA bitstream &lt;/home/ceca_517/LPWAN/SOAR(a)PKU/LPWAN/BladeRF/hostedx115-latest.rbf&gt;bf>... [bladeRF sink] bladerf_load_fpga has failed with -11 [bladeRF sink] Warning: 'loopback' has been specified on a bladeRF sink, and will have no effect. This parameter should be specified on the associated bladeRF source." 2.when I use HackRF, I set the parameter as "hackrf=393b4b,bias=1,bias_tx=1,buffers=32.” and I got error as: "(top_block.py:5108): IBUS-WARNING **: The owner of /home/ceca_517/.config/ibus/bus is not root! gr-osmosdr v0.1.4-86-ge9dde9af (0.1.5git) gnuradio 3.7.10 built-in sink types: hackrf bladerf redpitaya file FATAL: bad lexical cast: source type value could not be interpreted as target Trying to fill up 1 missing channel(s) with null sink(s). This is being done to prevent the application from crashing due to gnuradio bug #528.” I want to know if I set the parameters wrong? Or anything else? Thanks a lot for your help and your time! Thanks very much!! Best, Qiuyue