So irritating, you find exactly the thread about your issue,
You ask for the answer, but they close it instead !!
So everyone else is going to end up here, with no voice, no way to even say "hey you jannie why you'd close are thread, do you have a learning disability" ?
How often do you end up mute in those top threads.
And they wonder why public forums are dying !
What you call necrodisease, the rest of the world calls common sense.
At this point, the issue the original thread was created for was already solved, and more than half the thread was people being trolls. anyone that cared in that thread had long since moved on to other things. Why would notifying them be of any use? You're not even facing the same issue! Start a fresh thread, outline all the details involved (including that you're playing with a co-op mod!) in your own thread, and discuss it without any irrelevant baggage.
The answer to your question is that in vanilla DX, you press Right Mouse Button, and if the body has items on it, you'll loot those first, and then pressing RMB again would pick up the body. If there's no free space in your inventory, you'll just be stuck trying to loot the body. In mods like DX: Revision, they made tweaks so the items would be dropped on the ground if you've no inventory space, but you're playing with an unnamed co-op mod, so all bets are off. Seeing as all the missions were made with only one player in mind, Player 2 might be stuck trying to loot it over and over, because the flag that says the body was searched is only getting set for Player 1.
This isn't about the content of this particular post. We've figured out a workaround. We're not even playing revision, that is just the place where the discussion, the most relevant google-determined discussion space was happening and now its been shutdown.
And no, right mouse button doesn't work. Everyone else who tries it like us is going to end up with the same problem. And now the discussion is closed so there will never be answer, nobody can post a answer, ask clarification no one, the micro community of the people who are having this problem, has been shattered forever by a careless, obsessive mods who probably has incentives to close threads/perform actions/increase his key performance indicators, that's why they're doing it, "necroposting" is just the handwave to justifying shutdown things.