@oshizu I don't know if this glitch has been solved. If you do start again, don't delete the game file with Grim in a house at's pretty much the only time you will get to play grim with all his Grim-like qualities because if you add him to a house using cheats he loses all his 'special' abilities when you enter CAS.
I tried a few things to see if i could get Grim to reap but they didn't work. Try saving your file as a different name and evicting Grim then play a sim and kill them to see if Grim can reap properly. If he can than I would assume that evicting Grim will work for you. My sims just got stuck in a never ending cycle of mourning while Grim just stood there. Mind you, my file was pretty massive by then which and had already been subject to some pretty serious bugs so that definitely didn't help me.
@Playalot What a quick, insightful response!
I tried doing exactly as you said. Saved my current file under its usual naming system, saved another "Grim as Townie" file, then saved a Testing file.
Oops, I didn't do exactly as you said, because I forgot to evict Grim from his house.
When I used a cheat to kill off one of my household members, though, Grim showed up right away and reaped him, after checking his tablet and stuff.
Next, I loaded the same test file and evicted Grim from his house before killing a sim. This time, too, he came right away, stood around a bit, then reaped the sim.
And by the way, what exactly are Grim's unique Grim-like qualities?
So, my file seems to be okay. Now I need to PM the IDC team (and you) to check if the team approves my returning to my pre-test file...
(I know I'm only in Gen2 now but it is my ninth attempt... the last time I got to Gen6 then clicked on Renaissance Sim and completed it by mistake.)