Hi, I'm still working on QtJava, and I've discovered another problem. You can't multiply two QWMatrix objects. In C++ you would just multiply then (a*b), but this is not possible in java. Maybe it's a good idea to generate methods for this. Something like QWMatrix.mult(QWMatrix) or a static method QWMatrix.mult(QWMatrix, QWMatrix). Emond Papegaaij