FBL5N - BSEG-REBZG values cause infinite loop FDM_COLL_INVOICE_GET_BY_REF

Question

Hello,
We have a problem where function FDM_COLL_INVOICE_GET_BY_REF looks at BSEG records in a loop. It finds the next BSEG record by using the contents of BSEG-REBZG.
Unfortunately, some of our BSEG records point back to each other. We have the situation where BSEG "A" points to BSEG "B", and BSEG "B" points back to BSEG "A".
For example:
BSEG-BELNR   9100011111  ->  REBZG = 9111122222
BSEG-BELNR   9111122222  ->  REBZG = 9100011111
This data is causing the loop to execute infinitely as the exit conditions are never met.
I cannot find a SAP Note that addresses this issue. It looks like the code involved is related to items in Dispute and Part Payments.
Has anyone out there experienced this issue?
Many thanks,
Stuart.

Answer 1

What release are you on?
There is note 1105687 addressing the scenario when a credit memo is entered as an invoice reference in an invoice item which can cause such an infinite loop, but that note is only valid up to rel. 6.03
There is also note 919415 but it is for even older systems.
If you are on a current release, then creating an OSS message is your best bet.
It would be theoretically possible to have a recent release with some already posted documents that were entered before the patch fixing such endless loops were applied... how likely is to have such old documents is another question. SAP support should help you to clean up the problematic records if this is the case.