This code dose not work 

im trying to change View operation details Line limit default from 40 TO 100 line

name="name">stock.move.line.operations.tree.mrp

 name="model">stock.move.line

name="inherit_id"ref="stock.view_stock_move_line_detailed_operation_tree"

name="arch" type="xml"

   xpath

 expr="//field[@name='move_line_ids_without_package']/tree" position="attributes"

                attribute name="limit">100

         xpath