Select pipe route

Currently I am working on a script that select a pipe route of the connected members. I want to use the SelBox command near the connection point, but it does not select.

I attached a file with the SelBox points for the selection, I use the command’s Cross selection option. I use Rhino 5.

Sweep route selection.3dm (163.2 KB)

Is SelectionMode=Crossing?

– Dale