Solution : https://service.sap.com/sap/support/notes/81362 (SAP Service marketplace login required)
Key words :
import parametersimport parameter reference field optional estlty stpo-stltyestlnr stpo-stlnrestlkn stpo-stlknestpoz stpo-stpozerekrs stpo-rekrs xthe source code, additional key words cs01, create function modulecs_bt_stpob_direct_field_upd, function group csbt, create - material & recursive', attached advance corrections, function module, material variant, recursive variants, program terminates
Related Notes :
| 68792 | Collective note for low-level code / recursiveness |