Panel with border layout inside a tab panel

i have a problem using a panel with border layout inside a panel.

says its not supported and must set the height.

i tried to set height in every panel without luck.

Code:

    Ext.create('Ext.tab.Panel', {
        items: [
            {
                xtype : 'panel',
                items : [    
                    {
                        xtype: 'panel',
                        layout : 'border' // error
                    }
                ]
            }
        ],
        renderTo: Ext.getBody()
    });

heres the fiddle (run and check the msg in the console)

http://ift.tt/1s35832

h

ow can i use a panel with layout border thats inside a panel tab -> panel -> my error panel.