Ext.Msg.alert fails with error

[andyjl]

Hello,

Using ExtJS 4.0.2a, I am attempting to call Ext.Msg.alert inside a listener method that is bound to an AjaxProxy.

Ext.Msg.alert('Error', 'Error details'); 

When this code is executed, I get this error:
Unable to get value of the property 'alert': object is null or undefined

Why am I getting this?

- Andrew

[andyjl]

Duplicate of http://www.sencha.com/forum/showthre...ils-with-error