Failure to write BOM

I have Tools | Options... | Export, [X] Write BOM yet File | Export is not writing a BOM to .txt files. Any ideas?

What encoding are you using? -> $filename(test.txt,Encoding)
How do you know there is no BOM?

What encoding are you using?

The default.

$filename(test.txt,Encoding)

There no $filename in the config file.

How do you know there is no BOM?

Hex editor shows none.

Ok it seems if you do not use $filename() in your config you get no BOM.

Thanks for the confirmation.