When people discuss an item not being looted based on the rules defined, this may help.
Recently, Oracle and I were looking at a ring that had LRC 20% on it. The rule that was included was "Lower Reagent Cost >= 15" and the human logic was that it should grab that ring, but it did not.
TM often explains that testing rules should be done using a container with your item examples you want to loot out in the wild and process your rules against that. That is exactly how we solved it and it took more times looking the secure than I remember.

What I did discover, this rule would loot armor really well, but left all jewelry in the container. I had added other jewelry both above and below the threshold of 15% just to see what would happen.
What finally worked was a complex rule made of the individual rules:
Jewelry
Lower Reagent Cost >= 15%
Which looked like:
[Jewelry AND Lower Reagent Cost >= 15% ]

So be willing to test your rules for success.

Gaderian

It wasn't even so much the issue that it wasn't grabbing things, but the actual time it took to loot what it did loot. Just to grab reagants and gold it was taking 20second or more.

Might be weird reviving this post BUT I really just wanted to say that this still works in 2020!

Playing on UOEvolution. I realize the script likely won't work perfectly due to a lot of customized items, but it isn't even working for most regular content. It does work, but SO slow. I have considered interference from other programs like UOS but turned them off from looking just to be sure.

So UOS and the shard itself takes care of the basic items if I wanted. Really, I was hoping to find a program that can evaluate various items to pull for me (+15 Skill items) or the such.

It just doesn't seem to be working properly for me.

I set up some options for the Rule enty and then moved them to the 'active rules'. I currently only have 'Any skill >=10'. 'Treasure maps', 'Gold', and 'bandages' but it isn't grabbing anything.

I have Automatic Corpse Loot selected. The Carve corpse option wasn't doing anything for me either.

IF the program looks it seems to take 15-20 seconds or longer to loot. Though it doesn't seem to want to loot most of the time either.

My name is Triunn (Tree-oon) but everyone just calls me Tree. I played this game when it first came out all those years ago but couldn't keep up the subscription at a young age. After awhile I played on freeshards and ultimately life just got in the way. Here I am... 20ish years later going back at it.

I am 33 years old, a fulltime college student a pursuing a PhD. Currently I am working on a Bachelors in Geoscieces with a concentration in Geology and GIS, Minoring in Biology, and aiming for a Certificat of Award in both Sustainability and Conservation. In my less academic time I actually did medieval recreation for many years and know how to actually do most of the skills within UO in real life.... but sometimes the game is just better.