WowAce

214x bad argument #4 to '?' (Usage: local info = C_TradeSkillUI.GetCraftingOperationInfo(recipeID, craftingReagents [, allocationItemGUID], applyConcentration))
[string "=[C]"]: in function `GetCraftingOperationInfo'
[string "return function() if InCombatLockdown() then return end"]:217: in function `?'
[string "@Ace3/CallbackHandler-1.0-8/CallbackHandler-1.0.lua"]:109: in function <...Ons/Ace3/CallbackHandler-1.0/CallbackHandler-1.0.lua:109>
[string "=[C]"]: ?
[string "@Ace3/CallbackHandler-1.0-8/CallbackHandler-1.0.lua"]:19: in function <...Ons/Ace3/CallbackHandler-1.0/CallbackHandler-1.0.lua:15>
[string "@Ace3/CallbackHandler-1.0-8/CallbackHandler-1.0.lua"]:54: in function `Fire'
[string "@Ace3/AceComm-3.0-14/AceComm-3.0.lua"]:260: in function <Ace3/AceComm-3.0/AceComm-3.0.lua:242>

Locals:
(*temporary) = "bad argument #4 to '?' (Usage: local info = C_TradeSkillUI.GetCraftingOperationInfo(recipeID, craftingReagents [, allocationItemGUID], applyConcentration))"

latest version of Ace3 

retail wow

Character stays still in Dornogal, not in combat, and the alert sound of bugsack just sporadically sounds off.

200+ errors is about over the course of two weeks, maybe. Haven't figure out what triggers it.

This error is not likely to be an Ace3 issue, but an error related to some addon that is using Ace3 and is crafting related.