| Symptom / Error | Most Likely Cause | Quick Fix | | :--- | :--- | :--- | | Please fill something in | The box is empty. | Type the number you want to find in the "Value" field. | | Access violation at address... / Thread 0 scan error | Memory fragmentation or multi-core instability. | First : Force CE to run on a single CPU core via Task Manager. Second : Reduce the scan buffer size in CE's settings. | | (100) appears in the error | This was likely the last scanned value and is just a hint. | Ensure you have re-entered the correct current value before scanning again. |
Here's a detailed breakdown of why this error happens, why the number "100" often appears, and other related issues you might run into.
: Searching for a 4-byte integer when the game uses a different format, like a float or double. Step-by-Step Solutions 1. Re-attach the Process
: Cheat Engine splits scanning workloads across multiple CPU threads. Thread 0 is the primary thread handling the initial data read.
Look at the input box right below the "Scan Type" dropdown. | Symptom / Error | Most Likely Cause
: Security software like Comodo AV or anti-cheats (e.g., Vanguard ) often flag Cheat Engine's memory-reading behavior as a threat, cutting the "thread" mid-scan. How to Fix the Error
If the error occurs immediately upon scanning while in a protected game, the anti-cheat is blocking it.
Security software like Comodo or Windows Defender can block Cheat Engine from creating the temporary scan threads required to search memory. Cheat Engine Recommended Solutions
Desperation led him to a dusty corner of the internet. He downloaded a legacy build of Cheat Engine, one that looked like it hadn't been updated since the dial-up era. He opened the process, targeted the game, and prepared to give himself infinite health. He typed "999" into the value box and hit First Scan . / Thread 0 scan error | Memory fragmentation
: Security software like Comodo or Windows Defender can block Cheat Engine from accessing other processes or creating temporary files.
If you are looking for percentages or decimal numbers, it might be a Float or Double.
Select for standard integers (like money, health, or ammo).
If your game crashed, restarted, or updated in the background, Cheat Engine might still be attached to a "ghost" process that no longer exists in your RAM. | | (100) appears in the error |
Whether the error happens or right when the progress bar hits 100% Your current Cheat Engine version and Windows version
Open your or third-party antivirus dashboard.
Right-click the Cheat Engine executable file and select .