18 U.S.C. § 3741 : Crimes And Criminal Procedure — Appeal — Criminal Procedure — Harmless Error And Plain Error—(Rule) Date: 9 Feb 2017 TEXT PDF See Federal Rules of Criminal Procedure Error or defect as affecting substantial rights, Rule 52. Defects in indictment, Rule 7. Waiver of error, Rules 12(b)(2) and 30. (June 25, 1948, ch. 645, 62 Stat. 846.)