Can a defendant appeal his conviction for possession of child pornography on the basis that the trial court failed to instruct the jury on the defense of transitory possession?

Defendant challenges his conviction for possession of child pornography based on the trial court's failure to instruct the jury on the defense of transitory possession. He also challenges a probation condition requiring him to undertake substance abuse treatment for marijuana use. For the reasons stated here, we conclude that there was no instructional error but that the trial court abused its discretion under People v. Lent (1975) 15 Cal.3d 481 ordering substance abuse treatment. With that condition stricken, we will affirm the judgment.