Heres another suggestion that I’ll try to explain. Basically, do a manual recursive search for all UDTs, just the top level UDT part, not down deep into it. Then for each UDT type, select one from your list of UDTs, and search through that to get a list of the tags inside it. Since that tag structure is static with each UDT, you can extrapolate that structure to every other instance of that UDT, to get a complete full list, when you’re really only going to each top level UDT and doing a couple other searches on each UDT. Depending on how many UDTs you’re spread out on, it could provide a big improvement.