java local variable unavailable

I'm getting the following error from the eclipse debugger: local variable unavailable. Tried to trim the code as much as possible. The problem is pretty simple, I have to use the DivisiveUI UpdateLog() method, from the Divise class, using variables from the Cluster class. The Divise has a list containing all of the clusters. Divisive and DivisiveUI has a reference to each other. How can I get access to the variables: sumDistance, avgDistance from the Divisive class? Tried writing a method in the Divisive class, still couldn't access the needed variables :| Thank you!

Error crops at log.append(text+"\n"); Source Not Found.

Divisive:

   package clusters;

        import java.util.LinkedList;

        public class Divisive implements Runnable
        {
            LinkedList<Record> mainTable;
            LinkedList<Cluster> clusterList;
            int meassureType;
        DivisiveUI parent;
        int clusterCount;

        Divisive(LinkedList<Record> mainTable, DivisiveUI parent)
        {
            this.parent=parent;
            this.mainTable=new LinkedList<Record>(mainTable);
            setMeassureType(0);
        }

    }

DivisiveUI:

 package clusters;



@SuppressWarnings("serial")
public class DivisiveUI extends JPanel implements Runnable{

    ClusteringSelection parent;
    Divisive divisive;
    JTextField clusterCount;
    JTextArea log;

    public void UpdateLog(String text)
    {
        log.append(text+"\n");
        log.setCaretPosition(log.getDocument().getLength());
    }
}

Cluster:

 package clusters;


public class Cluster 
{
    LinkedList<Record> table;
    LinkedList<MatrixRow> matrix;

    LinkedList<Double> center;
    double sumDistance;
    double avgDistance;

    int meassureType;
}