Jumping here from the thread above where you pointed that this one should work for zmud.
I pasted things in, but when I do a whof after fam who pk, I am getting nothing. Looking at @FamTargetList, it is showing =<empty>, so for some reason the fam who pk isn't populating with the results.
I did try the cmud one with the multistate, just to see, but it didn't work either, although I wasn't expecting that one to.
Useing version 7.21