Cheat Engine attempts to scan every type of memory region. Some regions (mapped files, images) have no "updates" to fill.
This filters out dead memory regions that cause Thread 0 to wait for updates that never arrive.
Verify that your game version is supported by Cheat Engine. Some games, especially those frequently updated, might require specific Cheat Engine versions or additional configurations.
Running Cheat Engine and your game as administrators can sometimes resolve access issues. Additionally, temporarily disabling antivirus software can help determine if it's interfering with Cheat Engine's functionality. Cheat Engine attempts to scan every type of memory region
Download Cheat Engine 7.5 or newer from the official website (cheatengine.org).
Avoid “100 upd” modded versions—they often contain broken scan routines.
Install and run as admin.
Note: The error "cheat engine scan error thread 0 please fill something in 100 upd" is almost non-existent in official releases after 7.4.
If you’ve landed on this article, chances are you are staring at a frustrating red box in Cheat Engine. The error message reads something like:
"Scan Error: Thread 0. Please fill something in 100 upd" (sometimes with a variant like "upd 100" or "update 100"). This filters out dead memory regions that cause
This is not a standard "access violation" or "driver load failure." It’s a more niche, timing-related error that often appears when you’re trying to scan memory in specific games (especially anti-cheat protected titles, emulators, or poorly optimized indie games).
This article will explain exactly why this error occurs, what "Thread 0" refers to, what "100 upd" means, and how to fix it permanently.
Once you’ve fixed the "cheat engine scan error thread 0 please fill something in 100 upd" issue, adopt these best practices: In plain English: Cheat Engine started a scan
Are you trying to run a script from a cheat table?
Before fixing the error, you need to decode the jargon.
In plain English: Cheat Engine started a scan on Thread 0, but the game stopped responding to memory read requests during the scan, and after 100 attempts, it gave up.