Using Fiddle: http://ift.tt/1vYq6EI

Using any browser, select last row of the grid, then click 'reconfigure', you will get:



Code:



Uncaught TypeError: Cannot read property 'isNonData' of undefined
ext-all-debug.js:128629 Ext.define.privates.onViewRefresh
ext-all-debug.js:11803 fire
ext-all-debug.js:12332 doFireEvent
ext-all-debug.js:33029 prototype.doFireEvent
ext-all-debug.js:12300 fireEventArgs
ext-all-debug.js:12274 fireEvent
ext-all-debug.js:93240 Ext.define.refresh
ext-all-debug.js:7381 Ext.Base.Base.addMembers.callParent