You can use Logical data base FTI_LDB_TR_POSITIONS and Function Module LBD_PROCESS to get account assignment reference. It is safe and easy to make a selection this way than direclty from tables.
You can use Logical data base FTI_LDB_TR_POSITIONS and Function Module LBD_PROCESS to get account assignment reference. It is safe and easy to make a selection this way than direclty from tables.