This specific error occurs when Cheat Engine attempts to allocate scanning tasks to your processor threads but fails to establish a proper connection with the target process memory. The most common catalysts include:
If you change how Cheat Engine looks for data, it changes what information it requires from you. Check the dropdown menu.
: Disable your real-time antivirus protection for five minutes and run a scan. If it works, your antivirus is the culprit.
The most frequent cause is simply leaving the main text box empty.
: Use community-made tools or launchers (like those found on Nexus Mods) that disable anti-cheat modules for single-player modding.
This error was more common in versions . Version 7.5+ has better error handling and will usually show a friendly "Please enter a value" pop-up instead of the Thread 0 error. Download the latest official version from the Cheat Engine website.
Cheat Engine Scan Error: thread 0: Please Fill Something In 100
Uncheck and MEM_MAPPED if they are enabled, as these often contain read-only execution code that triggers thread access errors. Click OK to save the changes. 5. Add an Antivirus Exception
This error often appears because a required text field was left blank. Before scanning, make sure you have entered a value in the "" text box on Cheat Engine's main interface. If you try to start a search without filling this in, Cheat Engine doesn't know what to look for, causing an issue like "Please fill something in".
Close Cheat Engine → Right-click on the CheatEngine.exe → Select "Run as Administrator." 6. Address Game Protection (Anti-Cheat)
Modern games use systems like or BattlEye that intentionally crash Cheat Engine's scanning threads to prevent hacking. Verify if the game has an active anti-cheat.
: Scanning for a decimal value (like coordinates or timer fractions) using a 4 Bytes integer format.
Sometimes Cheat Engine’s internal scanner remains in a "pending" or "zombie" state. Reset it:
