ERRO DETECTADO : ExecutarSql:Incorrect syntax near ','.

System.NullReferenceException: Object reference not set to an instance of an object. at System.Object.GetType() at webcbf.CBF_CLASSE.Bancodedados.FillDataSetFromReader(DataSet ds, String table, IDataReader dr) at webcbf.rel_comunicados_cbf.Page_Load(Object Sender, EventArgs E)