Variable Pattern cannot drive Pattern Driven Component Pattern?

Hello All,

I am trying to create a pattern driven component pattern in an assembly that is generated/driven by a variable pattern created in my part file. (screenshot attached)

In my assembly when I create the pattern I try to select the "Driving Feature or Component" I get an error when trying to click the variable pattern from the associated part.

Has anyone else encountered this error? I understand Variable Pattern is a new 2015 feature but why wouldn't I be able to drive my pattern driven pattern from this pattern?

Thanks,

Luke

SolidworksAssemblies