I have a LimeSDR-USB installed on a Rasberry Pi 4 running under Raspbian 10 (Buster). Loading the self_test.ini in the LimeGUI everything works as expected. I have another LimeSDR-USB installed on a Raspberry PI 3 B+ also running Raspbian 10 (Buster). Loading the self_test.ini throws a failed to load file error with the helpful log entry : ERROR Read(64 Bytes) failed. The example.ini file loads successfully and displays as expected in the FFT viewer.
Any clues as to this behavior ? Please advise.