Recently I am doing some simulation works in Aspen Plus environment, and the process involes my self Unit Operations. But the inlet material stream mixture is very special, one of the compounds is very very bit in the mixture, it's mole fraction is about 1E(-20).
As you know, my self Unit Operation needs to get the composition through CAPE-OPEN interfaces from the inlet material stream. The composition is passed from GetOverallProperty interface method as a double VARAINT format, but the double format in C++ does not support so many decimals, so is there some mechanism to deal with this problem? Any response will be appreciated, thank you!