We do have a UOM class of Count that includes AR (as required), EA (each), and ZZ (unknown). However, this part somehow got stored with the UOM code UNKN. We don’t have this code setup. I suspect this is a holdover from decades past. Can I correct this myself, or do I need to conjure up a sacrifice for the support gods?
I had never had this exact issue but we did have parts in the system with a completely blank UOM. I assume it was leftover from some kind of data import or something. Eventually they did provide a datafix.
Does this issue exist in your test system, maybe try creating the UOM code?