--- /dev/null
+---
+title: onLoadFailed
+name: options-onloadfailed
+---
+
+When loading the data by ajax fails, then the option **onLoadFailed** is called.
+
+{% highlight js %}
+$('#tree1').tree({
+ dataUrl: '/my/data/',
+ onLoadFailed: function(response) {
+ //
+ }
+});
+{% endhighlight %}