no message

src/_VisualDVM/GlobalData/Machine/UI/MachinesForm.java

@@ -16,6 +16,9 @@ import java.awt.event.ActionListener;
 public class MachinesForm extends DataSetControlForm<Machine> {
     public MachinesForm(DataSet<?, Machine> dataSource_in, JPanel mountPanel_in) {
         super(dataSource_in, mountPanel_in);
+    }
+    @Override
+    protected void createColumns() {
         AddColumns(
                 new ColumnInfo<Machine>("URL") {
                     @Override