Solution : https://service.sap.com/sap/support/notes/498484 (SAP Service marketplace login required)
Key words : 
directory/general/r3server/abap/note, 5b support package 48 sapkh45b48    release 4, 6c support package 27 sapkb46c27    release 4, terms function module trfc_qrcvtid_delete, delta request extracts records, 'delta update' update mode, rsc2_qout_read_data function module, 0b support package 70, 0a support package 4, accurate diagnostic methods
Related Notes : 
       
| 583086 | Diagnostic program for BW DeltaQueue | 
| 498475 | Error 3 when writing to the PSA | 
| 481278 | Installing qRFC Version 6.20.045 | 
| 420371 | Add. info on upgrading to Basis 4.6C SR2 (NDI upgrade) | 
| 401717 | Additional info on upgrading to SAP Web AS 6.10 (Basis) | 
| 390062 | Additional information about upgrading to 4.6C SR2 | 
| 329622 | Additions: Upgrading to Basis 4.6C SR1 (NDI upgrade) | 
| 327285 | Additions to upgrade to 4.6C SR1 | 
| 208975 | Additions to upgrade on Basis of 4.6C (NDI upgrade) | 
| 147337 | Additional info for upgrade to Release 4.0B SR | 
| 117668 | Additional info: Upgrading to 4.5B |