https://userapps.support.sap.com/sap/support/knowledge/en/3734973
3734973 - BADI SD_BIL_DATA_TRANSFER, custom logic did not trigger to fill custom field when...
The expected Badi SD_BIL_DATA_TRANSFER for custom field value mapping is not called according to trace. SD_BIL_DATA_TRANSFER badi is working for other document...