Solution : https://service.sap.com/sap/support/notes/84731 (SAP Service marketplace login required)
Key words : 
lines     5769ss1 tc97217    5769ss1 sf41645    5769ss1 sf42613    5769ss1 sf42716    5769ss1 sf42698    5769ss1 sf42738, upgrade report missing ptf sf42645 additional key words installation, ptf     del objlnk, ptf sf42645, edtf     edtf stmf, file /tmp/v4r1m0, replace sf42645, file v4r1m0, '/tmp/v4r1m0, directory /tmp
Related Notes : 
       
| 79913 | V4.R1 Releases and PTFs for R/3 on AS/400 | 
| 74772 | Additional Info: Upgrading to 3.1H DB2/400 |