When DPL encounters a value's name in an expression during an analysis, it checks to make sure the state of each conditioning event is known. If not, DPL displays the error message "Influencing event not in a known state". If the conditioning event states are known, DPL determines what the value is corresponding to those states and uses the result to evaluate the expression. This means that an expression can produce a different number in different parts of a decision tree. The following are examples of expressions containing values:
Sales_Price * Sales_Volume min(Floor_Price, Market_Clearing_Price)
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