Rebate issue, Credit memo or Debit memo will update into VBo2?

Hi all,

Please help to resolve the below issue.

Issue is : Some invoices( created before Rebate agreement creation) are not updated into VBo2.

Action taken: Did run the t code VBoF but it says list contains no data. Have checked VOFA for the billing doc type for F2 and G2, L2 for all the rebate active button is active along with Sales org and payer master.

some more nformation: Agreement created on 29th Sep 2014, some documents were updated those who have  been created before agreement created and after valid from date of the agreement after running the t code VBoF And please please note all these updated documents are billing document type F2.

My question is the billing type credit memo or debit memo will update into VBo2? serched in google but i got different links which did not help to resolve my issue.

Please let me know if any more inforamtion required?

thanks,