BAPI_PO_CREATE1 - Message 06 - 437

Hi:

We have upgraded to ECC6 (EHP4) and since then the functional module we use to create PO's, by using BAPI_PO_CREATE1, does not work anymore.

I get the following SAP message: 06 437: Distr. ind. and partial invoice ind. must be set for multiple acct. assgt.

We have never set them in the contract before and the PO's were created without any errors.

Is there something we must change in the BAPI to get past this message ?

Thanks.

W.