Solution : https://service.sap.com/sap/support/notes/154003 (SAP Service marketplace login required)
Key words : 
hp/lcp 15-17 additional key words cem, directory /specific/iscem/v20a/crt_15_17, /usr/sap/trans/eps/, 0b /cem v2, import hp/lcps 15-17, respective data files, car -xvf hp_crt, car -xvf lcp_crt, transaction spam call, solution cem
Related Notes : 
       
| 212876 | The new archiving tool SAPCAR | 
| 141148 | CEM P3G: Released Hot Packages/LCPs | 
| 132203 | CRT not in SPAM queue | 
| 104127 | @3B@Documentation Hot Package Collections to 4.0B | 
| 97630 | OCS: Familiar problems with patches 3.1H-4.0B | 
| 53902 | Conflicts between Support Packages and add-ons |