Relations Between Parts in Different Instances of a Family Table

Hi all,

New to Creo and I'm at a brick wall.

I created relations between two parts.  When I replace part A1 with part A2 my second part, Part B, adjusts as needed. 

I created an instance of my assembly in a Family table that contained part A2.  When I open this instance Part B does not adjust and I see the warning,

"Some relations are no longer satisfied in  ASSEMBLY_A2 for LENGTH:0"

The session ID's are correct in both instances, and the dimensions appear to not drive the length contray to the relations.

In the generic assembly the relations work when I use the replace command, they just don't work when I switch instances in a family table.

I feel like I am missing something fairly obvious but my research into the problem has come up dry.

Any thoughts on what I am missing are very appreciated.