How do I add Hypothetical Components in DW Sim? In File Tab, New Compound Creator Study, I could enter Molecular Weight and Constant properties. But, in Temp dependent properties, I could see there are 3 options to enter Liquid Density, Estimate (Rackett), Equation and Regression methods, but by any of these means, I'm unable to add a new hypothetical component. I am getting error message. Can you please explain with an example how to add hypo components. The properties of the hypo component that I want to add are Molecular Weight, Critical Temp, Critical Pressure, Density, Accentricity.