Hi Pascal,

I just made the following class and everything seems to be working okay. Let me know if this code doesn't help you.

Ben

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

public class matrixcalctest extends MaxObject {

JitterObject jo = new JitterObject("jit.op");

public void jit_matrix(String mname) { JitterMatrix out = new JitterMatrix(); JitterMatrix arr[] = new JitterMatrix[] {new JitterMatrix(), new JitterMatrix()}; arr[0].frommatrix(mname); arr[1].frommatrix(mname); out.frommatrix(mname);

jo.send("op", "+"); jo.matrixcalc(arr, out);

outlet(0, "jit_matrix", out.getName()); } }

Ben

Without seeing more code, this doesn't look like an error resulting from myobj.matrixcalc(new JitterMatrix[]{m1,m2},m); since matrixcalc (Object,Object) should accept the following input. It wouldd appear that elsewhere you are using myobj (or some other instance of JitterObject in place of a required JitterMatrix type). Could m1 or m2 be JitterObject instead of JitterMatrix? Might want to post a minimal, but similarly offending .java file for more feedback.

-Joshua

Thanks a lot ..for the precision ..and sorry for the noise. My "JitterMatrix"..were created as behind "JitterObject"..so changing the declaration ..solve my problems.. Need to read more deeply the Jitter Java Docs..

Pascal