Solution : https://service.sap.com/sap/support/notes/561488 (SAP Service marketplace login required)
Key words : 
-- solution            import support package 7, conversion exit <> 'alpha' exit, source code correction, symptom message rsm 384, bw support packages, 0b support package 07, conversion exit, support package, terms rsm 384, 0b patch07
Related Notes : 
       
| 574213 | P8:SDL: Time and date selections in external format | 
| 517950 | SAPBWNews BW 3.0B Support Package 07 |