A Warning message in AFT xStream

Full Message text is:

Temperature is below the saturation line for the following:

 

The solution indicates that the temperature and pressure conditions at the specified pipe are such that one or more gas components has reached saturation conditions. This warning only occurs with Chempak fluids, NIST REFPROP fluids, or ASME Steam selected on the Fluid panel. When temperature falls below saturation, xStream's solution accuracy will be decreased, as xStream always assumes the fluid is superheated and will attempt to extrapolate gas properties below the saturation line.