SAP Note 10391 - Dun vendors -> Account field is empty /F150

Symptom

Dunning vendors.
The vendor account is not printed in either the account list or the list of blocked accounts.

Cause and prerequisites

Program error.

Solution
Error in RFMAHN01 corrected for release 2.1.
Error in RFMAHN03 corrected for release 3.0F.
Make the following change to program RFMAHN01 and RFMAHN03:
after the statement SELECT SINGLE * FROM LFA1 .....
comes a statement KONTO = LFA1-KUNNR.

Replace that line with

KONTO = LFA1-LIFNR.

Key word: RFMAHN01, RFMAHN03.