Solution : https://service.sap.com/sap/support/notes/379940 (SAP Service marketplace login required)
Key words : 
symptom unicode based mysap availability reason, sap-certified operating system ends, operating system/database combinations, hp provide migration support, sap web application server 6, hp tru64 unix os, os/390 database server support, unicode platform availability, supported mysap solutions, os/400 os/390 linux 3
Related Notes : 
       
| 1319517 | Unicode Collection Note | 
| 1139325 | Procedures and tools to enable ABAP programs for Unicode | 
| 765475 | Unicode Conversion: Troubleshooting | 
| 588480 | Release restrictions for Unicode in SAP BW 3.x | 
| 548016 | Conversion to Unicode | 
| 544623 | New Installation of Unicode SAP systems |