defining payoff of basket option

Posted by Eye Doc on
URL: http://quantlib.414.s1.nabble.com/defining-payoff-of-basket-option-tp6930.html

 
I would like to know how I can define a payoff function for a basket opion.
I want to price a simple basket option (call / put) on the arithmetic mean of the components.
 
I have tried 
 
Option.Type optionType = Option.Type.Call;

EuropeanExercise europeanExercise = new EuropeanExercise(maturityDate); 

PlainVanillaPayoff payoffCallBask = new PlainVanillaPayoff(optionType, strikePrice);

BasketOption

baskOption = new BasketOption(payoffCallBask, europeanExercise);

but get the message: "wrong payoff given"

(I am just learning how to use Quanlib. I use Quantlib in C# via SWIG. 
 

regards,

Bastiaan

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