Integration SD-FICA direct without CI mapping FICA fields

Hello,

We are implementing an integration with SD-FICA in S4Hana for an IS-T project. We are facing with a problem trying to fill DFKKOP-PYMET in the posting direct process without convergent invoice.

We have included the field PYMET in the include CI_FKKRW_ACCITA of the structure FKKRW_ACCIT. We have filled the field in event 4000 but when the document is posted the field is empty.

Could be any other custom event in FICA which is called after 40* events that could clearing this field?

Thanks and regards.