Interest calculation indicator OL is not included in table T056

Happy new year SAP Experts

We are currently busy with an SAP upgrade from 4.7 to ECC6. Currently busy with unit tests. I am experiencing problem with the interest execution for debtors, transaction "FINT". When executing this transaction i am getting an error message that the interest indicator is not maintained in table T056.

We checked the table with the ABaper but the code "OL" is being maintained on the said table. Where are we going wrong?

Message:

Interest calculation indicator OL is not included in table T056

Message no. MSINT012

I tried to look on the forum, but to no avail, perhaps I am missing something.

Please help.

Theo