Cheat Engine Scan Error Thread 0 Please Fill Something In 100 ✦ Official
Follow these steps in order. In 99% of cases, the solution is simple.
If you have filled in the value box correctly and selected the correct scan type, but still receive the error, consider these possibilities:
Why this works: CE requires a comparison baseline. "Unknown initial value" tells CE to scan all memory without a specific number. Blank tells CE nothing. Follow these steps in order
Goal: Find health value (currently 100, changes when you get hit).
No error because you never left the Value field empty (except if using Unknown scan, which is handled differently). Then click First Scan again
No. Some paranoid forums claim this error is a sign of a keylogger or remote access tool interfering with Cheat Engine. That is false. This is a pure programming logic error inside Cheat Engine itself. No malware uses the phrase "Please fill something in." That is wholly from the CE developer team's error messaging.
Cheat Engine (CE) remains the gold standard for memory scanning and game modification on Windows. However, even veteran users occasionally encounter cryptic error messages that halt progress. One of the most confusing and frustrating errors appears during the memory scanning process: Why this works: CE requires a comparison baseline
"Scan Error: Thread 0: Please fill something in (100)"
If you are staring at this pop-up, your first thought is likely: Fill what in? I already entered a value! This article breaks down exactly what this error means, why it occurs, and—most importantly—how to fix it permanently.
| Cause | Explanation | |-------|-------------| | Invalid data type mismatch | You selected "String" as scan type but typed a number like 100, or vice versa. | | Scan type "Unknown initial value" but no follow-up | This error rarely appears with "Unknown" scans, but can if you then click "Next Scan" without entering a changed/exact value. | | Corrupted Cheat Engine settings | In rare cases, the CE settings file (userdefined.txt) or the registry entry can cause false validation errors. | | Access violation deep in memory | Very rare – the error would mention "Access Violation" not (100). |
Hidden settings can break the value parser.
