In a rant from 2009 someone stated this problem about To-From lists in routing add-in:
"3. When importing from a from-to list is used, whenever ANY route is started in that route subassembly, ALL connection points in the entire assembly, including those connection points that are on components in the top-level assembly or other route assemblies, are added to the route."
I am running into this problem now. I have a nice electronics box assembly with 20 parts and 60+ connection points. I import a to-from list for 10 of those points and it automatically selects ALL of the connection points in the assembly, even if they are not called out in the to-from list. This bogs down the computer, generates small stubs when you complete the route and then you have to go in and delete the extra stubs in sketch mode. I can't figure out how to keep this from happening without suppressing the extra assembly components before importing the list, and then unsuppressing them later, which is unacceptable and a pain.
Does anyone know how to prevent this? did I just miss a simple check box?