California, United States of America
The following excerpt is from People v. Snow, F072851 (Cal. App. 2017):
The erroneous admission of evidence in violation of the secondary evidence rule does not require reversal unless a timely objection to exclude the evidence appears on the record, exclusion should have resulted from the objection stated, and the error resulted in a miscarriage of justice. ( 353.) An error is harmless unless it is "reasonably probable that a result more favorable to the appealing party would have been reached in the absence of the error." (People v. Watson (1956) 46 Cal.2d 818, 836 (Watson).)
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