windows GNU Radio error 12 Fatal failed to find rtlsdr device

Jose Mihotek jmihotek at
Mon Apr 16 23:06:29 UTC 2018

 I installed GNU Radio for windows on my machine running Windows 10.when I try to run GRC it comes back with:
<<< Welcome to GNU Radio Companion >>>
Block paths: C:\Program Files\GNURadio-3.7\share\gnuradio\grc\blocks
Loading: "C:\Users\JoseM\Documents\GNU\test w grc.grc">>> Done
Generating: 'C:\\Users\\JoseM\\Documents\\GNU\\'
Executing: C:\Program Files\GNURadio-3.7\gr-python27\python.exe -u C:\Users\JoseM\Documents\GNU\
Win32; Microsoft Visual C++ version 14.0; Boost_106000; UHD_003.010.001.001-0-unknown
gr-osmosdr c653754d (0.1.5git) gnuradio source types: file osmosdr fcd rtl rtl_tcp uhd hackrf bladerf airspy redpitaya Using device #0 Generic RTL2832U OEMusb_open error -12
FATAL: Failed to open rtlsdr device.
Trying to fill up 1 missing channel(s) with null source(s).This is being done to prevent the application from crashingdue to gnuradio bug #528.
Anybody have any idea how to fix this ?Thanks,
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