Field help (FRM3TYPFIL) 

Is used to define the location of the directory containing the generated bank files.

SEEINFOIn "client/server" mode and in "web" mode, the "customer" choice is suggested by default as soon as the REPBANKDEF setup ("Setup" tab, BP chapter, DEF group) is entered at user record lever for the current user.
Otherwise, the "Server" choice is suggested by default.