The radical solution is to add a memory stick and replace the system with a 64-bit one, so there will be no 12 error.

If you don't want to add memory chips, the solution to the error 12 is mainly archiving. As long as the archive file is not too large, the error 12 will not occur.

1.

From this location: document \ electronic arts \ sims3 \ saves, find out the error file (suffix. Bad), delete, temporarily solve.

2.

Use sims 3 file cleaning to reduce file size and solve temporary problems.

3.

Don't put too many things in your backpack, don't remember anything in the settings, don't put too many things at home, and try not to edit the town.

I once got the error 12. This is my method, but it can only be temporarily relieved. As long as you play for a long time, the error 12 will still appear. ...

Finally, I changed 64 bits without error 12.