Purchase rebate

Dear sap consultants,

I am facing a issue in purchase rebate

We created a rebate arrangement with vendor , po released, migo and miro is done.

we executed the business volume updation, interim settlement ,and fiinal settlment also.

our issue is it not all creating the accounting document after settling the subsequent settlemnt.

We have checked in FBL1n - vendor line item display but no accounting document related to rebate is appearing.

it is working well in other clients

now we r in final stage with diff client,

i checked all config everything seems to be ood.

request u to thro some light hence it is very critical

thanks in advance

A.Gururajan