This error only happens sometimes and I've been experiencing it for months, still don't know what's causing it.
Basically at some point throughout the game, I will be unable to move Sims into houses. Just now I've evicted a family to move them into a new house and I just can't. I will click the new property and nothing will happen. I then am stuck with Sims in the clipboard that I can't move or merge with other families and end up having to restart the game.
I've tried clearing StoryProgression logs and saving to a new save file. This error comes out of nowhere and I can't really pinpoint when it's going to happen, so it's annoying when I'm playing Russian roulette with Sims on the clipboard.
Any advice?

EDIT: When this error occurs, I also can't place new lots into the world. Again, I'll click and nothing happens at all.

Does this happen when the current play session has gone on for a while? Some Edit Town functions require extra resources, and if the game is already close to its RAM limit, one of these operations could push it over the limit. An easy way to check would be to put the game in windowed mode and bring up the Task Manager. If the game is using more than around 3.3 GB memory, even a small spike in usage could be a problem.

If this isn't the issue, are the same households always affected? Does it help if you only mess around in Edit Town immediately after loading a save? You could quit to desktop and reload before trying anything.

Do you have Error Trap installed? Does it produce any logs when the issue happens?

Chain_Reaction wrote: ↑

February 16th, 2021, 4:04 am

Do you have Error Trap installed? Does it produce any logs when the issue happens?

I do, and no it doesn't. It could be related to what puzzleaddict said, I will have to have a look.

puzzlezaddict wrote: ↑

February 14th, 2021, 12:23 pm

Does this happen when the current play session has gone on for a while? Some Edit Town functions require extra resources, and if the game is already close to its RAM limit, one of these operations could push it over the limit. An easy way to check would be to put the game in windowed mode and bring up the Task Manager. If the game is using more than around 3.3 GB memory, even a small spike in usage could be a problem.

If this isn't the issue, are the same households always affected? Does it help if you only mess around in Edit Town immediately after loading a save? You could quit to desktop and reload before trying anything.

This could be it, I'll have a look. The game is set to use 8GB of RAM though, but I feel like this is the most likely reason as to why. Thank you.

Sims 3 can only use 4 GB RAM, minus some overhead; there's no way to force or allow it to use more. So regardless of any settings you've changed, the game will still have the same limit.