If you are encountering the "Scan Error: thread 0 please fill something in" while using Cheat Engine, it usually means the software is trying to access a memory region that it doesn't have permission to read, or the scan settings are invalid.
Ensure you have typed a number or hex string into the input field before clicking First Scan or Next Scan. If you are encountering the "Scan Error: thread
Scan error:thread 0:Please fill something in 100 - Cheat Engine Use Cheat Engine only on games you own
: This specific error suggests that Cheat Engine cannot properly access its own temporary scan files. This can be caused by a lack of administrative permissions, insufficient disk space, or a "read-only" status on the Cheat Engine Software Incompatibility : Security software like Comodo AV/Firewall Ensure you have typed a number or hex