extjs4.1 - ExtJS 4.1.1a: Nested accordion layout in border layout cannot have title without width -

extjs4.1 - ExtJS 4.1.1a: Nested accordion layout in border layout cannot have title without width -

i've created viewport border layout , trying have 'panels' accordion side bar in west region, below

ext.create('ext.container.viewport', { layout : 'border', items : [{ xtype : 'panel', part : 'west', title : 'panels', layout : { type : 'accordion' }, items : [ { title : 'item 1', html : 'content 1' }, { title: 'item 2', html: 'content 2' } ] } ] });

this not work extjs giving me 'layout run failed' message. either 1 of 2 options below solves problem it's not want:

remove title config accordion panel. add width config accordion panel.

is there way set title without setting width?

'border' layouts must have 'center' region. should work when add together center part parent border layout.

accordion extjs4.1