How do you set up Aria Player as a multi in Logic Pro X?

I followed the manual, but I can't solo instruments (so far). It's all or nothing.

Using the Aria Player as a multi in Pro Tools, you put it on an aux track, then route midi channels through it. To solo and/or bounce a track, you Solo-safe the aux, then solo the track. You can bounce out individual stems and start mixing. You have all your HP data, keyswitches, everything works.

I installed Logic Pro X - I’m trying to do the same thing. I can’t find a way to solo a track when using a multi (my JABB bank saved in Finale).

All tracks play always unless you solo one (besides the first one). Then none play. Soloing both the desired track and the "source" track gives all sounds, not just the selected one.