error with parameters in swig code

[Roger Durañona Vargas <luo_hei@...>]

Im using swig to generate wrapper code for some classes in my project. I 
have a class member declared this way:
        void getPosition(float &x, float &y, float &z);
        #ifndef SWIG
        Ogre::Vector3 getPosition() {return mNode->getPosition();}; 
//vector version
        #endif

But if I use this:

var:getPosition(x,y,z)

in lua scripts I get this error: Error in getPosition (arg 2), expected 
'float &' got 'nil'
Can somebody see what is my mistake here?

--
Roger D. Vargas
Using Gentoo Linux 2010
La unica forma de encontrar los limites de lo posible es yendo mas
alla de ellos, hacia lo imposible