The llGiveInventoryList function returns a "Cannot Find Destination" error when attempting to deliver items to an agent that is in a different sim, if that agent has never been in the same sim as the script, or if the script has been reset since the time the agent was there. If the agent was in the same sim as the script running, then it will deliver it to that agent no matter where they are in the grid, but if the script is reset, or if the agent has never been in the same sim, it "Cannot Find Destination." No such limitation was mentioned in the function documentation, and I am assuming that this is a bug (and a serious one considering the impact it has on inventory delivery scripts). It is important to note that the regular llGiveInventory function is not restricted by this limitation.