How do I add the total amount of substance of a mass conservation law (moiety) to a report or mathematical expression?
COPASI does not know about the amount of substance for a mass conservation law. However, you may select the value of a moiety in the expert mode of the selection widget. This value is the total particle number of the mass conversation law, i.e., the conserved value. You can convert this value with the help of a global quantity of type assignment to your desired units or to concentration.