Fill Something In 100: Cheat Engine Scan Error Thread 0 Please

It looks like you're encountering a specific Cheat Engine error:
Thread 0: Please fill something in (100)

This usually appears when you try to run a scan but haven't entered a value to search for.

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What If the Error Happens During "Next Scan"?

If the error appears on a "Next Scan" but not on the "First Scan," you have a different issue: It looks like you're encountering a specific Cheat

• Reason: The current scan region or results list is corrupted.
• Fix: Click "New Scan" (reset the scan) and start over. After the first scan, do not change the Value Type or Scan Type in a way that invalidates previous results.

What causes this error

• You clicked "First Scan" or "Next Scan" with the Value field completely empty.
• You might have deleted the existing value (e.g., 0 or 100) and left it blank.
• Some Cheat Engine versions require at least one character/number before scanning.

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Step 2: Check Scan Type and Corresponding Fields

Different scan types require different input fields:

| Scan Type | What you must fill | |-----------|--------------------| | Exact Value | Single numeric or text value | | Value between | Two values: "Value 1" and "Value 2" | | Bigger than... | One value in the "Value" field | | Smaller than... | One value in the "Value" field | | Grouped | Pattern like 4:100 8:200 (address:value pairs) | What If the Error Happens During "Next Scan"

If you chose "Value between" but only filled "Value 1" (leaving "Value 2" blank), you will get the Thread 0 error.

Fix: Either fill both boxes or change scan type to "Exact Value." Reason: The current scan region or results list

Step 4: Ensure a Process Is Selected

• Click the "Select a process to open" icon (computer with a magnifying glass).
• Choose the correct game/application process.
• Verify the process name appears in the title bar of Cheat Engine (e.g., "Cheat Engine 7.5 (taskmgr.exe)").

Without a process, the scanner has no memory space to search. Thread 0 will abort immediately.

3. Corrupted Cheat Engine Settings or Configuration File

Sometimes, an old or corrupt cheatengine-i386.exe configuration file causes the value input field to not register keystrokes properly. You type a number, but internally CE sees an empty string.

Fix 2: Choose the correct scan type

If you want to scan for text (e.g., player name):

1. Change Value Type to String.
2. In the Value field, type the text (e.g., Hero).
3. Click First Scan.

If you want to scan for an unknown initial value (e.g., health bar with no number):

1. Set Scan Type to Unknown initial value.
2. Leave the Value field blank – this is the only case where blank is allowed.
3. Click First Scan – this will NOT give the error.
4. Then change value in game, set Scan Type to Increased/Decreased value, leave Value blank again, click Next Scan.