You clicked "First Scan" or "Next Scan" while the main text input box for the value was completely blank.
: Cheat Engine may lack the necessary authority to read the game's memory or write its own temporary data. : Always run Cheat Engine as an Administrator Check Folder Permissions
The most common cause is simply having an empty "Value" box when running a new scan.
Using a 32-bit version of Cheat Engine on a 64-bit game (or vice versa) can cause thread errors. You clicked "First Scan" or "Next Scan" while
The exact phrase "Please fill something in 100" is not a standard Cheat Engine error string — it may be from an older translation, a modified version, or even a joke/meme. But the underlying issue almost always points to an empty or invalid scan input or a thread initialization failure .
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
Sometimes Cheat Engine’s internal scanner remains in a "pending" or "zombie" state. Reset it: Using a 32-bit version of Cheat Engine on
Antivirus programs view memory modification as a trojan-like behavior. They will silently terminate Cheat Engine's scanning threads, resulting in "Thread 0" errors.
It is possible to open Cheat Engine, leave the process list empty, and immediately click "First Scan." The error will appear because there is no target memory space to scan.
Let’s simulate a correct scan for a game (e.g., solitaire, score = 100): If you do not know the exact value,
: Disable your real-time antivirus protection for five minutes and run a scan. If it works, your antivirus is the culprit.
[User Action: Click First Scan] │ ▼ [Thread 0 Evaluates Input Field] │ ├──► (Field is empty or formatted incorrectly) ──► ERROR: "Please Fill Something In" │ └──► (Field contains valid integer/float) ──► Memory Scan Initiated Successfully The error triggers under a few specific conditions:
Click the flashing in the top-left corner. Select your game or application from the Process List .
: Right-click the Cheat Engine shortcut and select "Run as Administrator" .