I changed the enum to c_int32 and it is now working.
Thank you very much for your help Mario.

Best regards
Adescour

The argtypes are passed as following: m = self.lib.ps6000RunStreaming(c_int16(self.handle), byref(sampleInterval), c_int16(sampleIntervalTimeUnits), c_uint32(maxPreTriggerSamples), c_uint32(maxPostTriggerSamples), c_int16(autoStop), c_uint32(downSampleRatio), c_int16(downSampleRatioMode), c_uint32(b...

Hi, I have written several python scripts working both on Windows 7 and Ubuntu 16.04LTS for my 6404D. But I am facing an issue in streaming mode, a script working fine on Windows reports an error on Linux (0x0D, PICO_INVALID_PARAMETER , A parameter value is not valid.) when calling the RunStreaming ...