We are having some difficulties setting up our cbsubs plans.

Currently we have two parent plans that set users up with two different access levels. One of this plans (lets call it Plan B ) has child plans and users must select at least one of these child plans. The two parent plans (A and B ) are set as exclusive and the children of B are set as non exclusive because users can choose more than one. The problems is that with this configuration if users select Plan B but don't choose a child plan, it is considered valid.

Is there any way that we can require one child plan to be selected? Thanks for any help