Gee, with Refresh there is an error.
With OnChangeCurrentRow if it works
EdgarCode:Procedure Refresh Integer eMode Forward Send Refresh eMode WebSet pbRender of oWebColectivas to (NmLibros.TpoPrestacion<>"7") WebSet pbRender of oOutputToComboNM to (NmLibros.TpoPrestacion<>"7") End_Procedure