Lisa,

I think you may have already solved it,

looks like you were almost there.

I added a new copy of BezierValue(bin) to the Rows shelf,

then right-clicked and selected "Show Missing Values",

and that seemed to get the curves started.

Once done, I removed that copy from the Rows shelf,

the other copies remaining untouched on the Path

and Detail shelves. Sheet3 of the attached is the result.