Error

"module not found" — How to Fix

Compiler Errors

2026-04-17T12:05:42+00:00

Fix the 'module not found' error by ensuring the module file exists at the correct path and is properly declared with the mod keyword.

The "module not found" error occurs because Rust cannot locate the module definition or the file path is incorrect. Ensure your module is declared with mod module_name; and the corresponding file exists at src/module_name.rs or src/module_name/mod.rs.

mod back_of_house;

fn main() {
    back_of_house::fix_incorrect_order();
}

If the module is in a subdirectory, verify the mod declaration matches the directory structure exactly.