Error/Exception when using a 3 phase separator for a stream with only gas and oil

[EvenSol]

Example when we get the error:
In this case the water in the feed is set to 0, and we will only have gas and oil in inlet separator.

feedFluid = {'ComponentName': ['water', 'MEG', "methane", "ethane", "propane","i-butane", "n-butane","i-pentane","n-pentane", "C6", "C7", "C8", "C9", "C10"],
'MolarComposition[-]': [0.0, 0.0, 80.0, 6.0, 2.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 0.01, 0.05, 1.01],
'MolarMass[kg/mol]': [None,None, None,None,None,None, None,None,None,0.091, 0.110, 0.13, 0.15, 0.25],
'RelativeDensity[-]': [None,None, None,None,None,None, None,None,None, 0.7, 0.78, 0.8, 0.82, 0.83]
}

    reservoirFluiddf = pd.DataFrame(feedFluid)
    fluid7 = fluid_df(reservoirFluiddf).autoSelectModel()
    fluid7.setMultiPhaseCheck(True)

    glycolFluid = fluid7.clone()
    glycolFluid.setMolarComposition([0.0, 1.0, 0.0, 0.0,0.0, 0.0,0.0, 0.0,0.0, 0.0,0.0, 0.0,0.0,0.0])

    clearProcess()
    feedStream = stream(fluid7)
    feedStream.setFlowRate(self.feedFlowRateTrain1, 'kg/hr')
    feedStream.setPressure(self.feedPressure, 'barg')
    feedStream.setTemperature(self.feedTemperature, 'C')

    glycolFeedStream = stream(glycolFluid)
    glycolFeedStream.setFlowRate(self.glycolFlow, 'kg/hr')
    glycolFeedStream.setTemperature(self.feedTemperature, 'C')
    glycolFeedStream.setPressure(self.feedPressure, 'barg')

    slugCatcher = separator3phase(feedStream)

    saturatedGasFromSlugCatcher = saturator(slugCatcher.getGasOutStream(), 'water saturator')

    valve1 = valve(saturatedGasFromSlugCatcher.getOutStream())
    valve1.setOutletPressure(self.sep1Pressure)

    sep1 = separator3phase(valve1.getOutStream())

    cooler1 = cooler(sep1.getGasOutStream())
    cooler1.setOutTemperature(self.cooler1T, 'C')

    sep2 = separator3phase(cooler1.getOutStream())

    mixer1 = mixer()
    mixer1.addStream(sep2.getGasOutStream())
    mixer1.addStream(glycolFeedStream)

    expander1 = expander(mixer1.getOutStream(), self.expOutPressure)

    sep3 = separator3phase(expander1.getOutStream())

    gasToExport = stream(sep3.getGasOutStream())

    runProcess()