Post
Sims 4: Save File Corruption Issue Update and 2026 Plans
The Sims 4 team provides an update on the save file corruption issue, explaining what fixes have been made in past base game updates, and what to expect for Sims 4 bug fixes and patches in 2026. Key topics include:
* Reviewing community-reported issues on a large scale and creating a new Python-based tool to analyze the structure and content of save files more efficiently.
* Investigation and fixes are underway for major issues such as infinite loading issues, error 801, and data transfer between save files.
* In early 2026, fixes are expected for issues such as disappearing flea market items and photos turning black.
1. 💾 Sims 4 Team Announces Update on Save File Corruption Issue
- ✅ The Sims 4 team provides an update on save file corruption, the most serious issue in the game.
- ⚠️ There are many causes of save file corruption, and there are concerns that it may not be completely resolved.
00:00 - 00:36
1. 💾 Sims 4 Team Announces Update on Save File Corruption Issue
- ✅ The Sims 4 team provides an update on save file corruption, the most serious issue in the game.
- ⚠️ There are many causes of save file corruption, and there are concerns that it may not be completely resolved.
00:37 - 02:33
2. 🛠️ Investigation and New Tool Development to Solve Save File Issues
- ✅ We are reviewing issues reported by the community on a large scale.
- ✅ We are tracking various issues such as disappearing lots, white screens, and infinite loading loops.
- ✅ We are developing a new Python-based tool to analyze the structure and content of save files more efficiently.
- ✅ This tool helps find patterns in file saving, mods, lot complexity, and version history.
02:34 - 03:05
3. 🐛 Issues Already Fixed: Resolved Infinite Loading Issue
- ✅ Fixed an infinite loading issue that occurred when converting a penthouse or dormitory into a residential rental.
- ✅ The fix was released on November 4th.
- ✅ Modified to allow you to check details about error codes occurring in save files.
- ✅ These fixes were released in the December 2nd update.
03:06 - 04:56
4. 🔍 Issues Currently Under Investigation: Overflow, 801 Error, Data Transfer
- ✅ We are investigating overflows, which are believed to be the main cause of disappearing lots.
- ✅ The save data becomes too large and reaches the save capacity limit.
- ✅ The memory boost feature has been shown to reduce this risk in some hardware configurations.
- ✅ Error 801 is still a top priority.
- ✅ Multiple game processes complete during loading, which can lead to inconsistent results.
- ✅ We are taking the precaution of relocating scratch files from the Documents folder to AppData.
- ✅ We are testing complex cheat or mod lots.
- ✅ We are investigating the issue of data from one save file being transferred to another save file in the same session.
04:57 - 06:14
5. 🗓️ Fixes You Can Expect in Early 2026
- ✅ A fix is expected for the issue where flea market items disappear and reappear.
- ✅ There will be additional fixes for the issue of photos turning black.
- ✅ There will be an update on scratch file migration, which will be rolled out in stages to closely monitor issues before fully deploying to all players.
- ✅ There will be further updates on save file investigations, including investigations into mod data.