Solution : https://service.sap.com/sap/support/notes/603575 (SAP Service marketplace login required)
Key words : 
key dtyp  length                tabname          char  10                varkey          char  48                dataln          int2   5                vardata          raw    0        <--- errorcorrect length, create sql table ncomed0314 invalid length, import_proper parconv_upg saint reason, ddact037 length vardata field, sqlt table ncom failedrequest, importing support packages terminates, vardataby2 database error -3020 occurred, allowedby0  > invalid length, vardata          raw   2048, vardatathe sql statement
Related Notes : 
       
| 782140 | OCS: Known problems with Support Packages in Basis Rel. 6.20 | 
| 586074 | Additions to the new installation IS-H 4.71 (SAINT) | 
| 447925 | OCS: Known problems with Supp. Packages in Basis Rel.6.20 |