How you fix this depends on whether you're a user trying to scan or a developer looking for the technical cause. Here are two ways to phrase that error message and its solution: 1. For a User Guide (Clear & Helpful)
"Cheat Engine Scan Error: Thread 0 (Empty Input)"This error occurs because the scan was started without any criteria. To fix this, ensure you have entered a Value (like your current gold or health) or selected a Value Type before clicking "First Scan." Cheat Engine needs to know what it’s looking for to begin the process. 2. For a Technical Support Forum (Direct & Concise)
"Fix: Scan Error Thread 0 - Please fill something in"The 'Thread 0' error is a generic trigger when the scanner has no data to process. To resolve:
Verify that a process is actually selected (glowing green frame). Input a number in the Value box.
If scanning for "Unknown initial value," ensure that specific scan type is selected from the dropdown menu first.
The error "Scan error:thread 0:Please fill something in" generally occurs when Cheat Engine is unable to access its temporary scan files or the targeted memory region is misconfigured. Common Fixes
Run as Administrator: Ensure you are running Cheat Engine with administrative privileges so it has the necessary permissions to read and write scan files.
Check Disk Space: Verify that your drive (where Cheat Engine or its temp files are located) has at least 500MB of free space. A "Stream read error" or similar thread error often triggers when the program cannot write new scan data.
Change Scan Results Location: In Cheat Engine, go to Settings > Scan Settings and set a custom folder for scan results. This often bypasses permission issues with the default temporary folder.
Adjust Scan Range: Ensure your "From" and "To" scan markers are valid. If they are set too wide (e.g., beyond the actual memory of the process), it can cause thread-level access violations.
Enable Memory Mapped Files: If you are scanning an emulated game (like a console emulator), go to Settings > Scan Settings and check the MEM_MAPPED box to allow Cheat Engine to see memory mapped files. Why "100 Better"?
The phrasing "fill something in 100 better" likely refers to refining your search. If you are getting 0 results after the first scan, the value might be encrypted or obfuscated. View topic - question please help - Cheat Engine
How to Fix "Cheat Engine Scan Error: Thread 0 Please Fill Something In"
If you’ve been trying to hack your favorite single-player game and were greeted with the frustrating "Scan error: thread 0 please fill something in" message, you aren't alone. This error is one of the most common roadblocks for Cheat Engine (CE) users, typically appearing right after you hit "First Scan."
The good news? It’s rarely a "broken" program. It’s almost always a configuration hiccup or a simple oversight in how you’ve set up your scan. Here is the definitive guide to fixing this error and getting back to your game. 1. The Most Common Culprit: Empty Value Fields
The error message literally tells you what’s wrong: "Please fill something in." How you fix this depends on whether you're
Cheat Engine cannot scan "nothing." If the Value box is empty or contains non-numeric characters when you are performing an "Exact Value" scan, the software doesn't know what it's looking for in the game's RAM. The Fix: Ensure you have typed a number into the Value box.
If you are trying to find an unknown value (like a health bar with no numbers), change the Scan Type to "Unknown initial value" before clicking First Scan. 2. You Forgot to Select a Process
Cheat Engine is a powerful tool, but it isn't psychic. It doesn't automatically know which game you want to modify. If you haven't attached CE to your game's process, the memory scanner has "Thread 0" (no active thread) to work with. The Fix:
Click the Computer Icon (Select Process) in the top-left corner. Go to the Processes or Applications tab.
Select your game’s executable (e.g., eldenring.exe) and click Open. Try your scan again. 3. Administrative Privileges
Games often run with high-level permissions to prevent external programs from messing with their memory. If Cheat Engine is running as a "Standard User" while your game is running as an "Administrator," Windows will block CE from accessing the game's threads. The Fix: Close Cheat Engine completely.
Right-click the Cheat Engine shortcut and select "Run as Administrator." Attach to the game and scan again. 4. Anti-Cheat Interference
Many modern games (even those with single-player modes) come bundled with Anti-Cheat software like Easy Anti-Cheat (EAC) or BattlEye. These programs specifically look for "Thread" manipulation and will block Cheat Engine from reading the memory, resulting in a Scan Error. The Fix:
Check if the game has an offline mode or a way to launch without the anti-cheat (often via a custom launcher or a command-line argument like -noeac).
Warning: Never attempt to bypass anti-cheat in multiplayer games, as this will lead to a permanent ban. 5. Check Your Scan Settings (Writable Memory)
Sometimes the error occurs because CE is trying to scan memory addresses that are protected or "Read Only." The Fix: Go to Edit > Settings in Cheat Engine. Click on Scan Settings.
Ensure that "Scan writable memory only" is checked (this is the default and most stable setting).
Make sure "Executable" memory is unchecked unless you are specifically looking for code injections. 6. Reinstall or Update Cheat Engine
If you’ve tried all the above and still see the error, your installation might be corrupted, or you might be using an outdated version that is incompatible with your version of Windows. The Fix: Uninstall Cheat Engine via the Control Panel.
Download the latest version from the official cheatengine.org website. Restart your PC and try a fresh scan. Summary Checklist Did I type a number in the Value box? Is Cheat Engine attached to the game process? Am I running Cheat Engine as an Administrator? Is a hidden anti-cheat blocking the scan? Always ensure you're scanning the correct process
By following these steps, you’ll clear the "Thread 0" error 99% of the time. Happy hacking!
Cheat Engine is a powerful tool for memory scanning and debugging, but it can be frustrating when a "Scan Error: Thread 0" message halts your progress. This specific error typically indicates that Cheat Engine is attempting to access a memory range it doesn't have permission for, or the scan settings are misconfigured for the specific game process.
If you are seeing the "Please fill something in" or "Thread 0" error, follow this comprehensive guide to fix it and optimize your scanning process. Understanding the "Thread 0" Error
This error usually pops up during the initial scan or when changing value types. It means the scanner crashed or failed to initialize because: The memory range is "Read Only" or protected.
Antivirus software is blocking Cheat Engine’s access to the process.
The game uses an anti-cheat system that hides memory addresses.
You are trying to scan a process that has already closed or crashed. Step 1: Run as Administrator
The most common reason for memory access errors is a lack of system permissions. Cheat Engine needs deep access to other running programs. Close Cheat Engine and your game. Right-click the Cheat Engine shortcut. Select Run as Administrator. Re-attach to the game process and try the scan again.
Step 2: Configure Scan Settings (The "Fill Something In" Fix)
If Cheat Engine asks you to "fill something in," it often means the scan parameters are blank or invalid. Ensure a value is entered in the Value box. Check your Scan Options:
Set Memory Scan Options to "ALL" instead of just "Writable."
Ensure the Start and Stop addresses are default (00000000 to 7FFFFFFFFFFF).
If you are doing an "Unknown initial value" scan, make sure you haven't accidentally set a filter that excludes all results. Step 3: Use the DBVM Debugger
If the game has basic protection, the standard Windows debugger might fail, causing Thread 0 errors. Open Cheat Engine and go to Edit > Settings. Navigate to Debugger Options. Change the debugger method to "Use DBVM debugger".
Note: This may require a system restart and BIOS-level virtualization (VT-x/AMD-V) to be enabled. Step 4: Adjust Memory Scan Options your value input is the problem.
Sometimes the error occurs because Cheat Engine is trying to scan "Copy on Write" or "Executable" memory that is locked.
Look at the Memory Scan Options section on the main interface. Uncheck "Executable" and "Copy on Write".
Ensure "Writable" is checked (this is the most common requirement for changing values like gold or health). Try scanning again. Step 5: Address Anti-Cheat Interference
Many modern games use "Easy Anti-Cheat" (EAC) or "BattlEye." These programs specifically look for Thread 0 hooks from tools like Cheat Engine.
Offline Mode: Always run your game in offline mode or with the internet disconnected if possible.
Kernel Tools: Use the "Kernelmode Debugger" settings in Cheat Engine to bypass user-land protection.
Renaming: Sometimes simply renaming the Cheat Engine.exe file to something random (like myapp.exe) helps avoid detection-based crashes. Pro-Tip for 100% Better Scans To make your scanning 100% more efficient and error-free:
Value Type: Don't just use "4 Bytes." If you get an error, try "Float" or "Double," especially for health or coordinate values.
Fast Scan: Disable "Fast Scan" (Alignment 4) if you are missing values, but keep it on to avoid unnecessary memory strain that causes crashes.
To help you get past this specific error, could you tell me: What game are you trying to scan?
Are you using the installer version or the portable version of Cheat Engine?
Does the error happen immediately or after the scan bar reaches a certain percentage?
Cheat Engine is a powerful tool used for modifying game memory on Windows. It allows users to scan for and modify values in the memory of a process, effectively enabling cheats such as infinite health, unlimited ammo, or increased speed.
You did all the above. You still see red text. The game is protected.
Modern anti-cheat systems (EAC, BattlEye, Vanguard) do not show "Scan Error." They crash the game or ban you. So, if you are seeing "Thread 0: Please fill something in," you are not banned. It is a software conflict.
The final 100% better checklist:
cheatengine-x86_64.exe for 64-bit games).90 90 90 (NOP sled). If that scans, your value input is the problem.