''Reversible Error'' as applies to the US, is related to what subject?

According to United States law, a reversible error is an error of sufficient gravity to warrant reversal of a judgment on appeal. It is an error by the trier of law (judge), or the trier of fact (the jury, or the judge, if it is a bench trial), or malfeasance by one of the trying attorneys, which results in an unfair trial. A finding of reversible error is required. Otherwise that, one or more of the appellant's ''substantial rights'' would be affected. The evidence in question would be of such character as to have affected the outcome of the trial. However, thinking over some criteria for determining a substantial rights, it must be considered on an individual basis.When an appellate court has determined that reversible error is occurred, it might have reversed the judgement of the lower court. This will be a new trial on such terms and conditions as are found to be just. Technically, attorney misconduct is not reversible error. Failure of the judge to remedy it during the trial is reversible error.