Per processor based error message

[mmattel]

Do You Need Immediate Help?

• no

Is This A Feature Request?

• depends

What Version Of Caldera Forms, WordPress and PHP Are You Using?

• CF: 1.9.2, WP: 5.5.3, PHP: 7.3

Does Your Issue Persist When You Disable All Other Plugins and Switch To The Default Theme?

• Not relevant

Following problem:

I am programming a processor and want to customize the success message for exactly this processor only (in the same way am am able to customize the error message). I do not want to touch the default message. But whatever I do this does not work.

//Change error message of AJAX submitted form.
add_filter( 'caldera_forms_render_notices', function( $notices ) {
	if( isset( $notices[ 'error' ], $notices[ 'error' ][ 'success' ] ) ) {
		$notices[ 'error' ][ 'success' ] = 'This worked great';
	}
	return $notices;
});

It does not matter if I put this filter into my plugin root or into the main function of it, It never triggers.

Question:
What is the correct approach?