diff --git a/sdk/jme3-core/src/com/jme3/gde/core/sceneexplorer/nodes/actions/impl/tracks/EffectTrackVisualPanel1.java b/sdk/jme3-core/src/com/jme3/gde/core/sceneexplorer/nodes/actions/impl/tracks/EffectTrackVisualPanel1.java
index 075df46d2..461c924e8 100644
--- a/sdk/jme3-core/src/com/jme3/gde/core/sceneexplorer/nodes/actions/impl/tracks/EffectTrackVisualPanel1.java
+++ b/sdk/jme3-core/src/com/jme3/gde/core/sceneexplorer/nodes/actions/impl/tracks/EffectTrackVisualPanel1.java
@@ -48,7 +48,9 @@ public final class EffectTrackVisualPanel1 extends JPanel {
     Spatial rootNode;
     JmeAnimation animation;
 
-    /** Creates new form EffectTrackVisualPanel1 */
+    /**
+     * Creates new form EffectTrackVisualPanel1
+     */
     public EffectTrackVisualPanel1(Spatial rootNode, JmeAnimation animation) {
         this.rootNode = rootNode;
         this.animation = animation;
@@ -59,9 +61,12 @@ public final class EffectTrackVisualPanel1 extends JPanel {
         populateModel(rootNode, model);
         jComboBox1.setModel(model);
         jComboBox1.setRenderer(new ListCellRenderer() {
-
             public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
-                return new JLabel(((Spatial) value).getName());
+                if (value instanceof Spatial) {
+                    return new JLabel(((Spatial) value).getName());
+                } else{
+                    return new JLabel("?");
+                }
             }
         });
         jSlider1.setMaximum((int) (animation.getLookup().lookup(Animation.class).getLength() * 100));
@@ -91,10 +96,10 @@ public final class EffectTrackVisualPanel1 extends JPanel {
         return (float) jSlider1.getValue() / 100f;
     }
 
-    /** This method is called from within the constructor to
-     * initialize the form.
-     * WARNING: Do NOT modify this code. The content of this method is
-     * always regenerated by the Form Editor.
+    /**
+     * This method is called from within the constructor to initialize the form.
+     * WARNING: Do NOT modify this code. The content of this method is always
+     * regenerated by the Form Editor.
      */
     // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
     private void initComponents() {