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Cheat Engine Scan Error Thread 0 Please Fill Something In 100 New May 2026

Some games (EAC, BattlEye, Vanguard) actively block Cheat Engine. When they do, they can force CE to report an “empty value” error because read/write calls return null.

What to do:

To resolve the error immediately, follow this checklist:

  • Check Scan Type: Does the "Scan Type" match what you put in the box?
  • Reset the Scan: If results are grayed out or stuck, click "New Scan" to reset the memory view and start over properly.

    • If you follow these steps, the "Thread 0" error will disappear, and the scan will execute successfully.

    "Scan error:thread 0: Please fill something in" typically occurs when Cheat Engine attempts to perform a scan (usually a "Next Scan") but the

    is empty, or the configuration is preventing it from reading the current input Cheat Engine Primary Fixes Fill the Value Box : Ensure you have typed a number into the input field before clicking First Scan Check Hexadecimal Box

    checkbox is ticked but you are entering a standard decimal number, Cheat Engine may fail to recognize the input correctly. Try unchecking it. Attach to Process Some games (EAC, BattlEye, Vanguard) actively block Cheat

    : Verify that you have successfully attached Cheat Engine to the correct game process by clicking the Computer Icon and selecting the active Cheat Engine Advanced Troubleshooting

    If the error persists despite having a value filled in, try these technical adjustments: Administrator Privileges : Right-click Cheat Engine and select Run as administrator

    . This is often necessary for CE to access the memory of other running applications. Enable MEM_MAPPED Settings > Scan Settings and ensure MEM_MAPPED

    is enabled. This allows Cheat Engine to scan memory that is mapped to files, which some games use. Change Scan Directory

    : If CE cannot write temporary files, it may trigger thread errors. Go to Settings > Scan Settings

    , check the box for a custom path, and select a folder that is not protected (e.g., a folder on your Desktop). Use 64-bit Version : If you are using the 32-bit cheatengine-i386.exe on a 64-bit application, switch to cheatengine-x86_64.exe to avoid compatibility-related thread errors. Disk Space : Ensure you have at least 500MB of free space To resolve the error immediately, follow this checklist:

    on your drive, as Cheat Engine creates large temporary scan files during the process. Are you seeing this error while following the built-in tutorial , or is it happening with a specific game

    Sometimes Thread 0 becomes locked:

    If you're still having trouble:

  • Post on Forums: Share your issue on the Cheat Engine forums or relevant community platforms. Providing detailed information can help get a faster and more accurate solution.

    • Always ensure you're using software responsibly and in compliance with the terms of service of the games you're modifying.

    Follow these steps in order. Most users solve the problem by step 3. Check Scan Type: Does the "Scan Type" match

    Let’s walk through a proper scan for a game where your character has 100 health:

    If you ever see the error again, you’ve missed step 5.

    Forum posts mentioning “cheat engine scan error thread 0 please fill something in 100 new” often refer to the “New Scan” button. After a user clears previous results or starts a fresh session, they click “New Scan” without entering a value.

    The “100%” likely comes from a misunderstanding of progress bars—some users think the scan is 100% complete, but in reality, the error occurs at 0% because no value was given.

    Remember: “New Scan” requires a value just like “First Scan.”