Retro Billing-Copy Control(VTFF) Routine for NEW PricProc in target doc.

Hi All

I am working on retro billng. I need to know if there is any routine in billing to billing copy control (VTFF) settings by which, when creating credit/debit memo with retro billing (VFRB), a new pricing procedure can be triggered in target document which will be different from the pric proc in source document.

Note: Pricing procedure determination settings already done for fethching new pricing procedure in credit/debit memo. but that setting is not working for fetching new pricing procedure.

I specifically need to know the routine in copy control for achieving the result,

thanks

Deepak Mehmi