BaDI - ME_PROCESS_REQ_CUST - Change Account Assignment

Hello Together,

I using BaDI ME_PROCESS_REQ_CUST with methods PROCESS_ITEM, PROCESS_ACCOUNT and POST to change the account assignment (GL Account). It works fine if I change or create a new PR with SAP transaction (ME51N or ME52N).

So my problem:

If I create a new Sales Order (TR: VA01) and a Purchase Requestion will created in background, then the changes (BaDI) will not triggered.

Has somebody an idea how I fix this issue?

Thanks in advance.

BR

Armin