Help with button to copy filename please

Trying to copy selected filename(s) without extension to the clipboard, this does not work

Please help

Is this okay?

Clipboard SET {allfile$|noext}

The method mentioned in the manual.

Clipboard COPYNAMES=nopaths REGEXP "(.*)\.(.*)" "\1"

Thankyou very much.
Clipboard SET {allfile$|noext} works well.

addendum: but not for multiple files.
Clipboard COPYNAMES=nopaths REGEXP "(.*)\.(.*)" "\1"
will work for multiple files, putting each file on a new line without quotes.

again thankyou.