Chempak Temperature/Pressure Outside Valid Range

A Warning message in AFT xStream

Full Message text is:

Chempak temperature and/or pressure is above/below valid range for the following:

The final solution had temperature and/or pressure conditions in the specified pipes obtained with Chempak physical property data which were beyond Chempak’s range of applicability. The range value is also displayed. This warning indicates the results may not be valid. It also may indicate an input error in the model because of the extreme temperature or pressure state.