>From what I can gather, this does not have much to do with Org mode proper, which has no org-agenda-property-list at all. I presume that you have
https://github.com/Malabarba/org-agenda-property/blob/master/org-agenda-property.el installed, which does provide such a variable, but all that one can say atm is that that library has a bug *or* is incompatible with (current?) Org mode. In either case, I think you should report it as an issue to the above site. Once they have figured out what is wrong, then maybe an RFE against Org mode *might* be indicated. -- Nick "There are only two hard problems in computer science: cache invalidation, naming things, and off-by-one errors." -Martin Fowler