| Symptom / Error | Most Likely Cause | Quick Fix | | :--- | :--- | :--- | | Please fill something in | The box is empty. | Type the number you want to find in the "Value" field. | | Access violation at address... / Thread 0 scan error | Memory fragmentation or multi-core instability. | First : Force CE to run on a single CPU core via Task Manager. Second : Reduce the scan buffer size in CE's settings. | | (100) appears in the error | This was likely the last scanned value and is just a hint. | Ensure you have re-entered the correct current value before scanning again. |
The "(100)" code can sometimes be confused with (error code 87 in some contexts, but 100 in others), reinforcing that an empty or invalid parameter was passed to the scanning function. | Symptom / Error | Most Likely Cause
: CE creates temporary files to store scan results. If the default directory is protected (like a user's Document folder with non-ASCII characters), it can trigger a "Stream read error" or "Access violation" on Thread 0. / Thread 0 scan error | Memory fragmentation
If Cheat Engine doesn't have permission to write temporary files to your drive, it will fail to "fill in" the scan results. | | (100) appears in the error |
The error in Cheat Engine occurs because the software is being asked to execute a memory scan while the "Value" input field is entirely blank . When Cheat Engine attempts to read the empty field, it cannot process the request, crashes the initial scanning thread (Thread 0), and throws a prompt reminding you to enter a number, string, or hex value before searching. Understanding the Anatomy of the Error
Understanding why Cheat Engine triggers this thread allocation failure is the first step toward fixing it:
What specific (e.g., 4 Bytes, Float, String) are you using?