matrixcalc error

I'm getting the following error in the Max window (java compiles fine) when inputting a matrix:

1297306704 calling matrixcalc on jit_rota

I'm not sure what this means, could someone point me in the right direction? Only references on the forum I could find were to dealing with more than one input matrix which is not my problem.

Here is some example code to demonstrate:

import com.cycling74.max.*;
import com.cycling74.jitter.*;

public class transToSegsBETA extends MaxObject {

    JitterObject myRota = new JitterObject("jit.rota");
    JitterMatrix work = new JitterMatrix(1, "float32", 1);

    public transToSegsBETA()
    {
        myRota.setAttr("boundmode", 1);
        myRota.setAttr("offset_x", 1);
    }

    public void jit_matrix(String inputMatrix_name)
    {
        JitterMatrix inputMatrix = new JitterMatrix(inputMatrix_name);
        int dim[] = inputMatrix.getDim();
        work.setDim(dim);
        myRota.matrixcalc(inputMatrix, work);
        outlet(0, "jit_matrix "+work.getName());
    }
}