ExtJs test scale

I have to check for an editable mesh. I am using Ext.grid.plugin.CellEditing

mesh to edit.

To edit the grid, I flipped initComponent

in Ext.Editor

and installed msgTarget 'side'

. It works well.

But I can't see the error image in any cell, not only editable.

_______________________________________
|_not_valid_____@|______________|_____|
|________________|__not_valid__@|_____|
|_not_valid_____@|______________|_____|

      

        
        
        
      

    

Where @errorEl, when we pass it, an error message appears.

How do I insert an error message into any cell?