No objection by the accused to the validity of the citation against him, on the ground of any discrepancy between the record copy of the indictment and the copy served on him, or on account of any error or deficiency in such service copy or in the notice of citation, shall be competent unless the same be stated to the sheriff at the first diet before the accused is called upon to plead, and no such discrepancy, error or deficiency shall entitle the accused to object to plead to such indictment unless the sheriff shall be satisfied that the same tended substantially to mislead and prejudice the accused.