underdefined components in copy with mates 2015

Greetings,

I am running 2015 SP 2.0.  Since on 2015 I have been getting a message most of the time when using "Copy with Mates."  I see there are several issues with mates in general in 2015, but I have not seen anyone complain about this.  I am not encouraged by that...  Does anyone else get this message?:

And if so, is there a known solution?  Sometimes I have been able to use copy with mates, but generally I get this message and cannot get it to work.

(Yes, the components are fully constrained / defined...)

Thanks!

Nate

SolidworksAssemblies