Solution : https://service.sap.com/sap/support/notes/302518 (SAP Service marketplace login required)
Key words : 
change history date     topic short description<, transaction smlt -> logs ->import history & import logs, /3 support packages  viii/r3up keyword  ix/  actions, support packages   viii/ r3up keyword, directory /usr/sap/put/exe, /   foreign languages  xi/  important notes, /   important general information  ii/  errors, execute action 'schedule import', enter industry solution 'ismp', -mp update level               precondition
Related Notes : 
       
| 486728 | Release restrictions for Release 4.6C1 | 
| 379878 | Language transport for IS-MP 20B (status SAPKIYM208) | 
| 214502 | Including PI in 4.6 upgrade without installation | 
| 156441 | Industry Solution Mill Products: Add-ons up to R/3 4.6C1 | 
| 153344 | Release strategy for R/3 Add-On IS-MP |