On 12 February 2017 at 07:21, Roy <roy...@me.com> wrote: > > The RPi3, which was working earlier, apart from hackrf_sweep: > > pi@raspberrypi3:~/hackrf/host/build $ hackrf_info > Found HackRF board. > Board ID Number: 2 (HackRF One) > Firmware Version: 2017.02.1 > Part ID Number: 0xa000cb3c 0x004f4f5b > Serial Number: 0x00000000 0x00000000 0x14d463dc 0x0f5cafe1 > pi@raspberrypi3:~/hackrf/host/build $ hackrf_sweep > hackrf_sweep: symbol lookup error: hackrf_sweep: undefined symbol: hackrf_open_by_serial > > So I rebooted and now I get this: > > pi@raspberrypi3:~/hackrf/host/build $ hackrf_info > hackrf_info version: git-0335f1a > hackrf_info: symbol lookup error: hackrf_info: undefined symbol: hackrf_library_release
This is picking up an older copy of libhackrf, possibly the previous install, possibly one from a package manager. As Martin suggested, using "ldd /usr/local/bin/hackrf_info" should show you which version is installed, this error message would suggest that it's picking up 0.4 rather than 0.5.
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