Solution : https://service.sap.com/sap/support/notes/333690 (SAP Service marketplace login required)
Key words : 
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Related Notes : 
       
| 437604 | |
| 390062 | Additional information about upgrading to 4.6C SR2 | 
| 367540 | |
| 327285 | Additions to upgrade to 4.6C SR1 | 
| 192949 | Additional info for upgrade to 4.6C | 
| 176472 | Euro: Upgrade 3.1I - 4.5B (4.6x), tax table entries |