Solution : https://service.sap.com/sap/support/notes/915661 (SAP Service marketplace login required)
Key words : 
package /msg/r_spu create, report /msg/r_s_mig_cust, newer release terminates, ddic activation due, fs-ri 472 system, source code corrections, call transaction se38, program /msg/r_s_mig_cust, import fs-ri 4, sapk-660xuinmsg reason
Related Notes : 
       
| 1490157 | Upgrade to SAP ERP 6.0, EHP5/NW702 with FS-RI 670 | 
| 1338539 | Upgrade to SAP ERP 6.0, EHP4/NW701 with FS-RI 660 | 
| 1142932 | Upgrade to SAP ECC 600 with FS-RI 650 | 
| 923524 | Upgrading to SAP ECC 600 with FS-RI 600 |