diff --git a/engine/src/blender/com/jme3/scene/plugins/blender/constraints/BoneConstraint.java b/engine/src/blender/com/jme3/scene/plugins/blender/constraints/BoneConstraint.java
index 386242ed5..a207c4f22 100644
--- a/engine/src/blender/com/jme3/scene/plugins/blender/constraints/BoneConstraint.java
+++ b/engine/src/blender/com/jme3/scene/plugins/blender/constraints/BoneConstraint.java
@@ -1,6 +1,5 @@
 package com.jme3.scene.plugins.blender.constraints;
 
-import java.util.Arrays;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
@@ -8,9 +7,7 @@ import com.jme3.animation.Animation;
 import com.jme3.animation.Bone;
 import com.jme3.animation.BoneTrack;
 import com.jme3.animation.Track;
-import com.jme3.math.Quaternion;
 import com.jme3.math.Transform;
-import com.jme3.math.Vector3f;
 import com.jme3.scene.Spatial;
 import com.jme3.scene.plugins.blender.BlenderContext;
 import com.jme3.scene.plugins.blender.BlenderContext.LoadedFeatureDataType;
@@ -181,38 +178,4 @@ import com.jme3.scene.plugins.ogre.AnimData;
         }
         return false;
     }
-
-    /**
-     * The method applies bone's current position to all of the traces of the
-     * given animations.
-     * 
-     * @param boneContext
-     *            the bone context
-     * @param space
-     *            the bone's evaluation space
-     * @param referenceAnimData
-     *            the object containing the animations
-     */
-    protected void applyAnimData(BoneContext boneContext, Space space, AnimData referenceAnimData) {
-        ConstraintHelper constraintHelper = blenderContext.getHelper(ConstraintHelper.class);
-        Transform transform = constraintHelper.getBoneTransform(space, boneContext.getBone());
-
-        AnimData animData = blenderContext.getAnimData(boneContext.getBoneOma());
-
-        for (Animation animation : referenceAnimData.anims) {
-            BoneTrack parentTrack = (BoneTrack) animation.getTracks()[0];
-
-            float[] times = parentTrack.getTimes();
-            Vector3f[] translations = new Vector3f[times.length];
-            Quaternion[] rotations = new Quaternion[times.length];
-            Vector3f[] scales = new Vector3f[times.length];
-            Arrays.fill(translations, transform.getTranslation());
-            Arrays.fill(rotations, transform.getRotation());
-            Arrays.fill(scales, transform.getScale());
-            for (Animation anim : animData.anims) {
-                anim.addTrack(new BoneTrack(animData.skeleton.getBoneIndex(boneContext.getBone()), times, translations, rotations, scales));
-            }
-        }
-        blenderContext.setAnimData(boneContext.getBoneOma(), animData);
-    }
 }
diff --git a/engine/src/blender/com/jme3/scene/plugins/blender/constraints/Constraint.java b/engine/src/blender/com/jme3/scene/plugins/blender/constraints/Constraint.java
index 7a883c8d0..3a92e6b59 100644
--- a/engine/src/blender/com/jme3/scene/plugins/blender/constraints/Constraint.java
+++ b/engine/src/blender/com/jme3/scene/plugins/blender/constraints/Constraint.java
@@ -1,10 +1,17 @@
 package com.jme3.scene.plugins.blender.constraints;
 
+import java.util.Arrays;
 import java.util.List;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
+import com.jme3.animation.Animation;
+import com.jme3.animation.BoneTrack;
+import com.jme3.math.Quaternion;
+import com.jme3.math.Transform;
+import com.jme3.math.Vector3f;
 import com.jme3.scene.plugins.blender.BlenderContext;
+import com.jme3.scene.plugins.blender.animations.BoneContext;
 import com.jme3.scene.plugins.blender.animations.Ipo;
 import com.jme3.scene.plugins.blender.constraints.ConstraintHelper.Space;
 import com.jme3.scene.plugins.blender.constraints.definitions.ConstraintDefinition;
@@ -12,6 +19,7 @@ import com.jme3.scene.plugins.blender.constraints.definitions.ConstraintDefiniti
 import com.jme3.scene.plugins.blender.exceptions.BlenderFileException;
 import com.jme3.scene.plugins.blender.file.Pointer;
 import com.jme3.scene.plugins.blender.file.Structure;
+import com.jme3.scene.plugins.ogre.AnimData;
 
 /**
  * The implementation of a constraint.
@@ -124,4 +132,38 @@ public abstract class Constraint {
      * that will have non modifying values for translation, rotation and scale and will have the same amount of frames as its parent has.
      */
     protected abstract void prepareTracksForApplyingConstraints();
+    
+    /**
+     * The method applies bone's current position to all of the traces of the
+     * given animations.
+     * 
+     * @param boneContext
+     *            the bone context
+     * @param space
+     *            the bone's evaluation space
+     * @param referenceAnimData
+     *            the object containing the animations
+     */
+    protected void applyAnimData(BoneContext boneContext, Space space, AnimData referenceAnimData) {
+        ConstraintHelper constraintHelper = blenderContext.getHelper(ConstraintHelper.class);
+        Transform transform = constraintHelper.getBoneTransform(space, boneContext.getBone());
+
+        AnimData animData = blenderContext.getAnimData(boneContext.getBoneOma());
+
+        for (Animation animation : referenceAnimData.anims) {
+            BoneTrack parentTrack = (BoneTrack) animation.getTracks()[0];
+
+            float[] times = parentTrack.getTimes();
+            Vector3f[] translations = new Vector3f[times.length];
+            Quaternion[] rotations = new Quaternion[times.length];
+            Vector3f[] scales = new Vector3f[times.length];
+            Arrays.fill(translations, transform.getTranslation());
+            Arrays.fill(rotations, transform.getRotation());
+            Arrays.fill(scales, transform.getScale());
+            for (Animation anim : animData.anims) {
+                anim.addTrack(new BoneTrack(animData.skeleton.getBoneIndex(boneContext.getBone()), times, translations, rotations, scales));
+            }
+        }
+        blenderContext.setAnimData(boneContext.getBoneOma(), animData);
+    }
 }
\ No newline at end of file
diff --git a/engine/src/blender/com/jme3/scene/plugins/blender/constraints/SpatialConstraint.java b/engine/src/blender/com/jme3/scene/plugins/blender/constraints/SpatialConstraint.java
index 20ec82aa5..b8179ac93 100644
--- a/engine/src/blender/com/jme3/scene/plugins/blender/constraints/SpatialConstraint.java
+++ b/engine/src/blender/com/jme3/scene/plugins/blender/constraints/SpatialConstraint.java
@@ -8,7 +8,9 @@ import java.util.logging.Logger;
 import com.jme3.animation.AnimControl;
 import com.jme3.animation.Animation;
 import com.jme3.animation.Bone;
+import com.jme3.animation.BoneTrack;
 import com.jme3.animation.SpatialTrack;
+import com.jme3.animation.Track;
 import com.jme3.math.Quaternion;
 import com.jme3.math.Transform;
 import com.jme3.math.Vector3f;
@@ -28,7 +30,7 @@ import com.jme3.scene.plugins.ogre.AnimData;
  * This includes: nodes, cameras nodes and light nodes.
  * @author Marcin Roguski (Kaelthas)
  */
-/* package */class SpatialConstraint extends BoneConstraint {
+/* package */class SpatialConstraint extends Constraint {
     private static final Logger LOGGER = Logger.getLogger(SpatialConstraint.class.getName());
 
     /** The owner of the constraint. */
@@ -40,6 +42,14 @@ import com.jme3.scene.plugins.ogre.AnimData;
         super(constraintStructure, ownerOMA, influenceIpo, blenderContext);
     }
 
+    @Override
+    protected boolean validate() {
+        if (targetOMA != null) {
+            return blenderContext.getLoadedFeature(targetOMA, LoadedFeatureDataType.LOADED_FEATURE) != null;
+        }
+        return true;
+    }
+    
     @Override
     public void performBakingOperation() {
         this.owner = (Spatial) blenderContext.getLoadedFeature(ownerOMA, LoadedFeatureDataType.LOADED_FEATURE);
@@ -130,6 +140,29 @@ import com.jme3.scene.plugins.ogre.AnimData;
         }
     }
 
+    /**
+     * The method determines if the bone has animations.
+     * 
+     * @param boneOMA
+     *            OMA of the animation's owner
+     * @return <b>true</b> if the target has animations and <b>false</b> otherwise
+     */
+    protected boolean hasAnimation(Long boneOMA) {
+        AnimData animData = blenderContext.getAnimData(boneOMA);
+        if (animData != null) {
+            Bone bone = blenderContext.getBoneContext(boneOMA).getBone();
+            int boneIndex = animData.skeleton.getBoneIndex(bone);
+            for (Animation animation : animData.anims) {
+                for (Track track : animation.getTracks()) {
+                    if (track instanceof BoneTrack && ((BoneTrack) track).getTargetBoneIndex() == boneIndex) {
+                        return true;
+                    }
+                }
+            }
+        }
+        return false;
+    }
+    
     /**
      * This method applies spatial transform on each frame of the given
      * animations.