Solution : https://service.sap.com/sap/support/notes/43618 (SAP Service marketplace login required)
Key words : 
additional key words r3loadex000001, log files manually, summarized error logs, error occurs, files starting, viewimp_bas phases, r3up refers, dsteu_importeu_import0eu_import1eu_import2eu_import3 viewimp_bas, data packets, accidentally created
Related Notes : 
       
| 37387 | Additional Info: Upgrading to 3.0D |