Here are some Virginia rules regarding errors on the summons.

Virginia Supreme Court rule 3A:4(b)

(b) Form of Summons. A summons, whether issued by a magistrate or a law-enforcement officer, shall command the accused to appear at a stated time and place before a court of appropriate jurisdiction in the county, city or town in which the summons is issued. It shall (i) state the name of the accused or, if his name is unknown, set forth a description by which he can be identified with reasonable certainty, (ii) describe the offense charged and state whether the offense is a violation of state, county, city or town law, and (iii) be signed by the magistrate or the law-enforcement office, as the case may be.

I believe an interpretation here is that there can be errors on the summons as long as the summons describes the offense charged.

Virginia Supreme Court rule 3A:6(a)

(a) Contents. The indictment or information, in describing the offense charged, shall cite the statute or ordinance that defines the offense or, if there is no defining statute or ordinance, prescribes the punishment for the offense. Error in the citation of the statute or ordinance that defines the offense or prescribes the punishments therefor, or omission of the citation, shall not be grounds for dismissal of an indictment or information, or for reversal of a conviction, unless the court finds that the error or omission prejudiced the accused in preparing his defense.

"shall not be grounds for dismissal unless..."