Once the court makes a definitive ruling on the record admitting or excluding evidence, either at or before trial, a party need not renew an objection or offer of proof to preserve a claim of error for appeal.
Tenn. R. Evid. 103
Advisory Commission Comments.
Part (a) restates current law. Errors must be substantial rather than harmless. The effect of a trial error, including an erroneous ruling on evidence, is set out if T.R.A.P. 36(b). Objections must be timely and specific. Offers of proof must indicate to the reviewing court what was excluded. Note that in Part (b) the trial court must permit a formal question-and-answer offer, the kind favored by appellate courts.
Part (d) recognizes that some errors are so plain and harmful that a trial judge can be reversed despite absence of objection. See T.R.A.P. 36(b), T.R.Crim.P. 52(b), and State v. Ogle, 666 S.W.2d 58 (Tenn. 1984) (reversing for Bruton error not raised in trial court or Court of Criminal Appeals).
Advisory Commission Comments [1991].
Subsection (a)(2) is amended to add a specificity requirement as to the evidentiary rule supporting an offer of proof, thereby making this requirement for offers consistent with that for objections in subsection (a)(1).
Advisory Commission Comments [2001].
The final sentence of Rule 103(a) eliminates the need to repeat objections or offers of proof.
Advisory Commission Comments [2005].
The second paragraph in Rule 103(b) provides a procedure for appellate review where parties disagree whether a communication is privileged. Rulings at trial are subject to interlocutory appeals pursuant to Appellate Rules 9 and 10.