diff --git a/sdk/jme3-core/src/com/jme3/gde/core/sceneexplorer/nodes/properties/SceneExplorerProperty.java b/sdk/jme3-core/src/com/jme3/gde/core/sceneexplorer/nodes/properties/SceneExplorerProperty.java
index 4c0a31df0..fafa3e1e6 100644
--- a/sdk/jme3-core/src/com/jme3/gde/core/sceneexplorer/nodes/properties/SceneExplorerProperty.java
+++ b/sdk/jme3-core/src/com/jme3/gde/core/sceneexplorer/nodes/properties/SceneExplorerProperty.java
@@ -136,9 +136,9 @@ public class SceneExplorerProperty<T> extends PropertySupport.Reflection<T> {
             if (undo) {
                 try {
                     Object oldValue = getSuperValue();
-                    if (oldValue.getClass().getMethod("clone", null) != null) {
-                        addUndo(oldValue.getClass().getMethod("clone", null).invoke(oldValue, null), val);
-                        Logger.getLogger(SceneExplorerProperty.class.getName()).log(Level.INFO, "Add cloned undo {0}", oldValue.getClass().getMethod("clone", null).invoke(oldValue, null));
+                    if (oldValue.getClass().getMethod("clone") != null) {
+                        addUndo(oldValue.getClass().getMethod("clone").invoke(oldValue), val);
+                        Logger.getLogger(SceneExplorerProperty.class.getName()).log(Level.INFO, "Add cloned undo {0}", oldValue.getClass().getMethod("clone").invoke(oldValue));
                     }
                 } catch (Exception e) {
                     addUndo(getSuperValue(), val);
diff --git a/sdk/jme3-gui/src/com/jme3/gde/gui/multiview/NiftyPreviewPanel.java b/sdk/jme3-gui/src/com/jme3/gde/gui/multiview/NiftyPreviewPanel.java
index 694ac65ba..2e159b9e0 100644
--- a/sdk/jme3-gui/src/com/jme3/gde/gui/multiview/NiftyPreviewPanel.java
+++ b/sdk/jme3-gui/src/com/jme3/gde/gui/multiview/NiftyPreviewPanel.java
@@ -205,9 +205,8 @@ public class NiftyPreviewPanel extends PanelView {
                     Logger.getLogger(NiftyPreviewPanel.class.getName()).log(Level.WARNING, "No Project AssetManager found!");
                     return null;
                 }
-                AssetManager assetManager = pm.getManager();
                 AudioRenderer audioRenderer = SceneApplication.getApplication().getAudioRenderer();
-                niftyDisplay = new NiftyJmeDisplay(assetManager,
+                niftyDisplay = new NiftyJmeDisplay(pm,
                         inputHandler,
                         audioRenderer,
                         guiViewPort);