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Al's picture

noHello,

If you can run 'demo_waterfall.py' you're in the pyrtlsdr directory rather than the application directory. The second time you ran it you were in the correct location.

The Traceback you see is due to a problem with the rtlsdr library, try installing it again:

mkdir build
cd build
git clone git://git.osmocom.org/rtl-sdr.git
cd rtl-sdr
mkdir build
cd build
cmake ..
make
sudo make install

Hope that helps.