18 U.S.C. § 3741 : CRIMES AND CRIMINAL PROCEDURE — CRIMINAL PROCEDURE — APPEAL — Harmless error and plain error-(Rule) 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. 18 U.S.C. § 3741 June 25, 1948, ch. 645, 62 Stat. 846.