Solution : https://service.sap.com/sap/support/notes/367097 (SAP Service marketplace login required)
Key words : 
parameter type reference      default opt pass valueno_check, frequently additional key words cj20, 'deletion indicator' status, function module cjwb_delete_elements, rcj_markl-mark space, function module cjwb_status_maintain, attached program correction, project planning board, longthe correction contained, import parameter
Related Notes : 
       
| 649844 | |
| 607000 | Required notes for PS-BAPIs | 
| 440503 | |
| 339123 | |
| 302636 |