Getting "Uncaught TypeError: Cannot read property 'Panel' of undefined"

[sergio.paulino]

I'm trying to activate sencha charts in an ajax response to a form, getting the graph data from a php file that throws a JSON response
The response is being thrown correctly, the js identifies the success of the form posting as true, but when it comes to creating the Panel for the graph I get the following error:

Uncaught TypeError: Cannot read property 'Panel' of undefined
innerformBase.items.items.handler.innerform.submit.success
Ext.Ajax.request.callback
Ext.data.Connection.Ext.extend.onComplete
Ext.data.Connection.Ext.extend.onStateChange
(anonymous function)

Could anyone help me with this situation?
Thanks in advance.

[mitchellsimoens]

Can we get some code where you are creating the chart and the response?

[sangampandey]

This is just because you are creating a refrence to panel after the ajax call which you need to do before that try if you get success else you need to share some code to us know whats the problem.