EXTJS3.4 : Uncaught TypeError: Cannot read property 'parentNode' of undefined

HI

If we are closing a tabPanel using closable: true, the default action will be destroying the tabPanel. And so, since the tabPanel is destroyed we wont be able to display the tabPanel again. But, I do not want the tabPanel to be destroyed, it has to be hidden so I tried this

Code:

this.Manage = new Ext.TabPanel({
             title: 'Manage',
             closable: true,
             closeAction: 'hide',
             activeTab: 0,
             items:[
                this.manageGridPanel


                ]
    });

What happens with this is, I am able to display the tabPanel but the child elements within that are not being displayed. And I am getting following exception in js console Uncaught TypeError: Cannot read property 'parentNode' of undefined Also because of this, I am not able to navigate to other tabpanels from my treepanel, I am getting the following exception in js console Uncaught TypeError: Cannot read property 'className' of undefined .

I also tried using the beforeclose event like this in the tabpanel

Code:

listeners: {
                          'beforeclose': function(panel) {
                              console.log('TP - beforeclose');
                                var closeAction = this.ownerCt.closeAction
                                if (closeAction === 'hide') {
                                    panel.hide();
                                    var el = Ext.get(panel.tabEl);
                                    el._savedWidth = el.getWidth();
                                    el.setWidth(0);
                                    el.setVisible(false);
                                    return false;
                                }
                                return true;
                            }
                        }

This is how I open the tab panel dynamically,

Code:

if(n.text=='Manage')
{ 
that.hometabPanel.add(manage.Manage).show(); 
}

Should I give tab.setVisible(true) ?or what changes should I make for this to work??



EXTJS3.4 : Uncaught TypeError: Cannot read property 'parentNode' of undefined