Hi, I'm using gnuradio 3.6 and gr-osmosdr branch gr36. When I try to run some script like osmocom_fft or using a block the osmosdr source in gnuradio-companion it throws this message: File "/usr/local/lib/python2.7/dist-packages/osmosdr/osmosdr_swig.py", line 22, in swig_import_helper _mod = imp.load_module('_osmosdr_swig', fp, pathname, description) ImportError: /usr/local/lib/libgnuradio-osmosdr-0.0.3git.so.0.0.0: undefined symbol: _ZN3uhd6device4findERKNS_13device_addr_tENS0_15device_filter_tE It works well if compiling the gr-osmosdr without UHD support cmake -DENABLE_UHD=OFF ../ Hope this helps