The court on motion of a defendant shall arrest judgment if the charge does not allege an offense or if the court was without jurisdiction of the offense alleged. The motion in arrest of judgment shall be made within 10 days after verdict or finding of guilty, or after plea of guilty or nolo contendere, or within such further time as the court may fix during the 10-day period. The finding of guilty or nolo contendere may be entered in writing or orally on the record.