Penal Code section 1237.1, which precludes a criminal defendant from raising an error in the calculation of presentence custody credits, at least as a sole issue on appeal, if she or he has not previously raised the error in the trial court, does not apply to juvenile appeals. Section 1237.1, which specifically refers to a final judgment of conviction, does not apply to juvenile appeals because juvenile proceedings are not criminal prosecutions. Juvenile appeals are separately authorized by Welfare and Institutions Code section 800. Therefore, since the juvenile court erred when it failed to calculate the minor’s precommitment custody credit, remand was required.