Is there any case law in which a trial court erred by allowing a plaintiff to introduce certain documents?

Tamale contends that the district court erred by failing to allow him to introduce certain documents. It appears, however, that the documents were admitted and considered by the court. At any rate, even assuming that some of the documents were excluded, Tamale failed to show how his case was prejudiced by the alleged omissions. See Jauregui v. City of Glendale, 852 F.2d 1128, 1131 (9th Cir.1988) (trial court's exclusion of evidence will not be reversed absent some showing of prejudice).