diff --git a/engine/src/blender/com/jme3/scene/plugins/blender/animations/ArmatureHelper.java b/engine/src/blender/com/jme3/scene/plugins/blender/animations/ArmatureHelper.java
index bd98cad3a..6af3cefca 100644
--- a/engine/src/blender/com/jme3/scene/plugins/blender/animations/ArmatureHelper.java
+++ b/engine/src/blender/com/jme3/scene/plugins/blender/animations/ArmatureHelper.java
@@ -236,7 +236,9 @@ public class ArmatureHelper extends AbstractBlenderHelper {
 				if (!p.isNull()) {
 					Structure ipoStructure = p.fetchData(blenderContext.getInputStream()).get(0);
 					Ipo ipo = ipoHelper.fromIpoStructure(ipoStructure, blenderContext);
-					tracks.add((BoneTrack) ipo.calculateTrack(boneIndex, 0, ipo.getLastFrame(), fps, false));
+					if(ipo != null) {
+						tracks.add((BoneTrack) ipo.calculateTrack(boneIndex, 0, ipo.getLastFrame(), fps, false));
+					}
 				}
 			}
 		}
diff --git a/engine/src/blender/com/jme3/scene/plugins/blender/modifiers/ArmatureModifier.java b/engine/src/blender/com/jme3/scene/plugins/blender/modifiers/ArmatureModifier.java
index 573f13d5d..ee5da3002 100644
--- a/engine/src/blender/com/jme3/scene/plugins/blender/modifiers/ArmatureModifier.java
+++ b/engine/src/blender/com/jme3/scene/plugins/blender/modifiers/ArmatureModifier.java
@@ -325,7 +325,6 @@ import com.jme3.util.BufferUtils;
 							if (boneIndex != null) {
 								float weight = ((Number) deformWeight.getFieldValue("weight")).floatValue();
 								if (weight == 0.0f) {
-									weight = 1;
 									boneIndex = Integer.valueOf(0);
 								}
 								// we apply the weight to all referenced vertices
diff --git a/engine/src/blender/com/jme3/scene/plugins/blender/modifiers/ModifierHelper.java b/engine/src/blender/com/jme3/scene/plugins/blender/modifiers/ModifierHelper.java
index f21a2ff9e..5688083f2 100644
--- a/engine/src/blender/com/jme3/scene/plugins/blender/modifiers/ModifierHelper.java
+++ b/engine/src/blender/com/jme3/scene/plugins/blender/modifiers/ModifierHelper.java
@@ -149,8 +149,10 @@ public class ModifierHelper extends AbstractBlenderHelper {
 			IpoHelper ipoHelper = blenderContext.getHelper(IpoHelper.class);
 			Structure ipoStructure = pIpo.fetchData(blenderContext.getInputStream()).get(0);
 			Ipo ipo = ipoHelper.fromIpoStructure(ipoStructure, blenderContext);
-			result = new ObjectAnimationModifier(ipo, objectStructure.getName(), objectStructure.getOldMemoryAddress(), blenderContext);
-			blenderContext.addModifier(objectStructure.getOldMemoryAddress(), result);
+			if(ipo != null) {
+				result = new ObjectAnimationModifier(ipo, objectStructure.getName(), objectStructure.getOldMemoryAddress(), blenderContext);
+				blenderContext.addModifier(objectStructure.getOldMemoryAddress(), result);
+			}
 		}
 		return result;
 	}