I am a Java absolute beginner and I've made an external that draws connections between points based on critical distance. As you can see from the patch (attached in a zip file together with java and class files) this external needs to be connected to jit.gl.mesh. Now the problem is that I get this error message after a while:

"u(some number) exists but is wrong class"

The message appears after a while and sometimes it pops in Max console only once while sometimes it becomes an ongoing error message.

public class connectPointsMultiLimit extends MaxObject {

    JitterMatrix jm = new JitterMatrix(3,"float32", particles, 1);

private static final int[] zeroOffset = new int[] {0};

        declareAttribute("min_dist");

        public void jit_matrix(String s){

        float row[] = new float[dim[0]*planecount];

        jm.copyVectorToArray(0, zeroOffset, row, dim[0]*planecount, 0);

     ArrayList myList = new ArrayList();

for ( int j=i+1; j < particles-1; j++ ) {

if (((diffx*diffx)+(diffy*diffy)+(diffz*diffz))< min_dist){

                myList.add (j);

         int[] indexArray = new int[ss];

         for (int i = 0; i < ss; i++) {

             indexArray[i] = myList.get(i).intValue();

JitterMatrix out = new JitterMatrix(1, "long",ss);

out.copyArrayToVector(0, zeroOffset, indexArray, ss, 0);

import com.cycling74.max.*;
import com.cycling74.jitter.*;
import java.util.*;
import java.util.ArrayList;

	int particles = 2000;
    int  maxConnections = 10;
	JitterMatrix jm = new JitterMatrix(3,"float32", particles, 1);
    private static final int[] zeroOffset = new int[] {0};
    int planecount = jm.getPlanecount();
    int dim[] = jm.getDim();

   // int dimX = dim[0];
    //int count = 0;
    float min_dist = 0.05f;

	connectPointsMultiLimit() {
		declareAttribute("min_dist");
        declareAttribute("particles");
        declareAttribute("maxConnections");
	}

		jm.frommatrix(s);
		float row[] = new float[dim[0]*planecount];
		jm.copyVectorToArray(0, zeroOffset, row, dim[0]*planecount, 0);
	    ArrayList myList = new ArrayList();

       for ( int i=0; i < particles; i++ ) {

        int pointA_index = i*3;
        float pointAx = row[pointA_index];
        float pointAy = row[pointA_index+1];
        float pointAz = row[pointA_index+2];
        int nrOfConnections = 0;

        for ( int j=i+1; j < particles-1; j++ ) {
        int pointB_index = j*3;
        float pointBx = row[pointB_index];
        float pointBy = row[pointB_index+1];
        float pointBz = row[pointB_index+2];
        float diffx = pointAx-pointBx;
        float diffy = pointAy-pointBy;
        float diffz = pointAz-pointBz;
         if (((diffx*diffx)+(diffy*diffy)+(diffz*diffz))< min_dist){
                myList.add (i);
				myList.add (j);
               nrOfConnections++;
               if (nrOfConnections >= maxConnections){
               break;
               }
           }
        }
        // outlet(0, nrOfConnections);
        }
            int ss = myList.size();
		    int[] indexArray = new int[ss];
		    for (int i = 0; i < ss; i++) {
		    	indexArray[i] = myList.get(i).intValue();
		    }

            JitterMatrix out = new JitterMatrix(1, "long",ss);
            out.copyArrayToVector(0, zeroOffset, indexArray, ss, 0);
            outlet(0, "jit_matrix", out.getName());

u637012436-exists-but-is-wrong-class

Alas, I am in the position of working with a large custom codebase made by someone else for an evolution of a project. The most frustrating thing about doing this is the utter inability to trace which mxj objects are generating messages in the Max window.

It would be nice to know what kind of situation generates these messages. Sigh.

jitter java is clearly not the future here ...

I'm wondering if someone is even in charge at cycling for java given the inexistent responses.

yep Joshua, difficult to trace ...
jitter java is clearly not the future here ...
I'm wondering if someone is even in charge at cycling for java given the inexistent responses.


Seeing this error too and I'm not using Java. Also can't be traced back to the culprit.

u637012436 exists but is wrong class