Is frustration of visitation a defense to child support?

We therefore hold that section 11350.1 specifies procedures to be followed in this action brought under section 11475.1. Section 11350.1 plainly states that the issues in actions such as this shall be limited to the questions of paternity and child support. Here defendant made no attempt to litigate the denial of visitation as a defense to his obligation to pay child support. Rather, the parties obtained an order containing a detailed visitation schedule and thereafter litigated compliance with the order apart from any duty of support. We therefore have no occasion to decide whether frustration of visitation is a defense to a child support obligation or, if it is, whether its litigation would be appropriate in an action brought under section 11475.1. (See Code Civ.Proc., 1694; Moffat v. Moffat (1980) 27 Cal.3d 645, 652, 165 Cal.Rptr. 877, 612

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