This is because the Cz electrode does not exist.
Use the name of an electrode that exists, otherwise the montage validator would reject it.
Example: Cz : 0 * Fp1
Other than that, you should not include these parentheses ("Fp1 (1) : Fp1 (1)").
This is because the Cz electrode does not exist.
Use the name of an electrode that exists, otherwise the montage validator would reject it.
Example: Cz : 0 * Fp1
Other than that, you should not include these parentheses ("Fp1 (1) : Fp1 (1)").