Solution : https://service.sap.com/sap/support/notes/833893 (SAP Service marketplace login required)
Key words :
legacy system migration workbench, source data record explicitly, legacy data reason, relevant support package, sap basis release 6, support package sapkb62036, import source data, import data, marked explicitly, source structures
Related Notes :
| 1066952 | Working with legacy data files in LSMW (Unicode, BOM, FTP) |