TypeError: Cannot read property 'parentNode' of undefined

[zurdophp]

Good morning from Valencia, Venezuela; and sorry for my poor english. I have two grids, one that is loaded into a panel (this panel is in a tab), and other that is loaded into another tab. Both are in a FormPanel, this FormPanel is in a Window that is called when I make double click from a record of a master grid. This master grid is called when I make click in an icon that is located on Web Desktop. The error is: "TypeError: Cannot read property 'parentNode' of undefined", and this occurs when I close the window that content the formPanel. I think that the grid is destroyed by the close instruction, and I can't use the property 'hide', because when I make double click in another record, the data is not loaded, and the task bar of the Web Desktop don't remove the item. Thanks in advance, I will return crazy with this issue...

PS: Don't put the code, because when I comment the lines that show the grids into a formPanel, the app work fine.

[Condor]

Not much information to go on...

Can't you hide the window (closeAction:'hide') and reuse the window for the next record, e.g.

var win = Ext.getCmp('mywindow');
if (!win) {
  win = new Ext.Window({
    id: 'mywindow',
    closeAction: 'hide',
    ...
  });
  win.render(Ext.getBody());
}
var form = win.find('itemId', 'myform'); // example - use your own method to locate the form in the window
form.getForm().loadRecord(record);
win.show();