how to add variables in the file name in Reciever CC?

Hi all ,

I am working on a outbound interface .

in the reciever communication channel i have to gve the file name as

S<plant code >.<file name>.<timestamp > >

example of filename: u201CS141. SPPFE860. 20110421114559u201D (The plant code has to be the same used in the field STABEMT presents in the header).

now in the structure it is like

MT

HEADER

STABMENT

i am using tht Avanced tab in CC but am not able to understand what to gve in reference.

Can you please help???