Calling fft from JAVA code does not work

Hello Everyone!

I have this piece of code in a matlab function (let's call it, matfun)

time_dip= double(senyal_V')
Pyy=fft(time_dip,n);

senyal_V is an array that I get as a parameter from a JAVA function, javafun, which I create as follows:

MatlabClass objecte= new MatlabClass();
double[] arreglo = {6.2d, 6.2d, 3.2d, 4.2d, 4.2d, 6.2d};
MWNumericArray mwarreglo = new MWNumericArray(x3, MWClassID.DOUBLE);
output = objecte.matfun(1,mwarreglo,4);

mwarreglo is the same parameter as senyal_V. The tricky thing is in the execution of the matfun in JAVA code. In the .m code you see a double cast, but still doesn't work. Either by defining the parameter senyal_V, as mwarreglo or arreglo type, it doesn't work. I don't know what to do to solve this problem. What drives me crazy is that if I invoke the matfun directly in Matlab, it works, no matter how I declare this parameter.

Any suggestions?

Thanks!