Sometimes, toggling "MEM_MAPPED" or changing the Start/Stop address bounds in Settings > Scan Settings can resolve underlying thread issues if the scan is targeting unreachable memory. Troubleshooting Steps
The error message is often a combination of a specific scan failure (Thread 0) and a prompt for user input (the "100" value). This usually happens when the software cannot access the game's memory or when temporary scan files are blocked. Common Causes for Thread 0 Scan Errors
Ensure no trailing spaces, punctuation marks, or letters are accidentally typed in. 2. Switch the Value Type to "All"
Windows may block Cheat Engine from reading a game's memory. Right-click the Cheat Engine shortcut. Select . Ensure your antivirus isn't "sandboxing" the program. 3. Invalid Scan Settings Common Causes for Thread 0 Scan Errors Ensure
Verify the . If you are scanning for text, make sure the type is set to String . If you are scanning for a number, ensure it matches the format (e.g., 4 Bytes , Float , Double ).
Sometimes Thread 0 crashes because Windows is blocking Cheat Engine from creating temporary scan cache data.
Result: Millions of addresses, but no Thread 0 error. Right-click the Cheat Engine shortcut
Searching for a specific value type (e.g., 4-byte) in a region that doesn't hold that type, or using incorrect "Scan Type" options (e.g., "Exact Value" when you should use "Unknown Initial Value").
A less obvious cause of this error occurs when there is a mismatch between your "Scan Type" selection and the input required.
: Ensure the drive where Cheat Engine is installed has at least 20GB of free space for temporary scan results. Change Scan Settings : ensure it matches the format (e.g.
: The target game runs with higher system permissions than Cheat Engine.
Even if you visually see a number like "100" in the Value box, a UI bug or an accidental space can cause the program to read it as blank. Click inside the input box. Delete any invisible spaces or existing text entirely.
: Right-click the Cheat Engine shortcut and select "Run as Administrator" .
If you do not know the exact value, change the Scan Type to instead of leaving an exact value box blank. 3. Match the Value Type to Your Input
The most frequent cause is simply leaving the main text box empty.