When a game is "100% patched" against Cheat Engine, it usually means values like gold, health, or premium currency are no longer stored on your local computer. Instead, they live on the game developer's cloud servers. When Cheat Engine tries to scan for these values locally, it finds nothing, resulting in a thread error.
If your error occurs when running an AOB scanning script:
In these cases, the error is . The anti-cheat driver prevents any external process from scanning game memory, causing CE's scan threads to receive an immediate failure when trying to "fill in" memory data. When a game is "100% patched" against Cheat
: Right-click the Cheat Engine executable file and select Run as Administrator .
: Cheat Engine splits scanning workloads across CPU threads. "Thread 0" is the primary thread managing the data dispatch. When it fails immediately, the scan never actually begins. If your error occurs when running an AOB
Leftover configurations from a previous game session are causing conflicts.
For online games or those with advanced protection, the error can be a sign of an active anti-cheat system. These systems, like the notorious Hackshield, are designed to block memory scanning tools. They can hide the game process, prevent memory access, or even shut down tools like Cheat Engine to prevent tampering [5†L5-L9]. A 2006 analysis of Hackshield noted that it could detect and block tools like "CheatEngine, ArtMoney, WPE (PRO)," and prevented DLL injection as a standard countermeasure [12†L20-L21]. This demonstrates that such protection mechanisms have been a long-standing challenge for memory modification tools. : Cheat Engine splits scanning workloads across CPU threads
If the error occurs during a scan, it may be hitting a "protected" memory range. Go to . Select Scan Settings . Uncheck "MEM_MAPPED" (this often triggers errors). Ensure "MEM_PRIVATE" is checked.