Several times I got a message where when I am bandaging or applying a saline bag to somebody and it would not say their name, but instead the text message says: I start applying saline/start bandaging to :'Error No Unit'
If the action is not canceled the item will be 'consumed' but the patient will not recieve it.
It seems to happen randomly, no viable way to reproduce.
I think this happend to me once before when I was collecting blood from my friend in a previous version. It said 'Error no unit' after the action was done the bloodbag was full and my friend did not lose any colour.
That was a long time ago (I don't remember which version) and I did not report it at the time.