One GitHub user fixed persistent access violations by reinstalling Cheat Engine and resetting all configurations—a nuclear but effective option when other solutions fail.
Not using "Pause the game" when scanning. For fast-updating values, freezing the game process ensures scan accuracy.
Try switching to VEH in Settings -> Debugger .
Don't panic. Your software isn't broken, and your game is likely fine. Let’s break down what causes this error and how to fix it so you can get back to modding your game.
4.5/5
If you are running out of RAM. Phase 6: Game-Specific Fixes
Ensure the target game is also running with appropriate permissions. 2. Check for Antivirus Interference
Create a fresh, non-admin user.
A broken update can affect ReadProcessMemory . One GitHub user fixed persistent access violations by
Some memory regions are marked NOACCESS or PAGE_GUARD . Scanning these triggers access violations. Solution: filter memory regions in Scan Settings to include only READABLE or EXECUTABLE_READWRITE regions.
Cheat Engine remains one of the most powerful memory scanning tools ever created. The "scan error thread 0" message is your gateway to understanding its scanning engine. The next time you see it, you'll know exactly what to do: fill something in, pick the right scan type, and start hunting for that 100 value.
Check the boxes for and Read/Write Process Memory .
Use Lua to read memory if standard scan fails. Phase 8: Dealing with Complex Memory Scan with Memory Alignment : Toggle alignment settings. Disable Fast Scan in Settings -> Scanner . Use Ignore for specific memory regions. Check for VirtualProtect calls. Use Debugger -> Break and Trace . Check Settings -> Scan Settings for Memory Protection . Use CE to Suspend target process before scanning. Try a Different Pointer. Scan for String or Unicode . Disable Auto-Attach . Phase 9: Final Troubleshooting & Reinstalls Try switching to VEH in Settings -> Debugger
If you’ve ever seen a red error message pop up in Cheat Engine saying scan error thread 0: please fill something in , don’t panic. This isn’t a sign that you’ve broken your computer or that Cheat Engine is refusing to work. It’s actually one of the most common mistakes beginners make, and it usually has a very simple fix. The error often appears as "scan error thread 0 please fill something in 100 best" or similar variants in forums, and it’s usually just a simple oversight combined with confusion about how to start a memory scan.
Cheat Engine loses track of processes if a game restarts or shifts focus. Click the in the top left corner. Look through the "Processes" or "Applications" tab. Re-select your game and click Open . Try your scan again. 3. Administrative Privileges
The programmer of the Hungarian forum gyakorikerdesek.hu had the same reaction when a user posted about this exact error: "你看一眼这个位置是不是什么也没填。你啥都不填就开始搜索ce也不知道你想搜啥呀！" — which translates to "Look and see if that position is completely empty. Cheat Engine doesn't know what you want to search if you don't fill anything in!"