this.renderChildren();
}
this.expanded = true;
- if(!this.isHiddenRoot() && (this.getOwnerTree().animate && anim !== false) || anim){
+
+ if(!this.isHiddenRoot() && (this.getOwnerTree() && this.getOwnerTree().animate && anim !== false) || anim){
this.ui.animExpand(function(){
this.fireEvent("expand", this);
if(typeof callback == "function"){