I'm trying to use Picoscope 6406E with python wrappers on raspberry pi. I get stuck on the very first step i.e. when I try to call ps6000a.ps6000aOpenUnit(). In particular, calling the following code: ret=ps.ps6000aOpenUnit( ctypes.byref(handle), None, 0 ) causes: picosdk.errors.PicoSDKCtypesError: ...