Solution : https://service.sap.com/sap/support/notes/1584667 (SAP Service marketplace login required)
Key words : 
import servermaster data serverimport clientsdata management clientsportal content  bp mdm application 7, master data management, 3 bp mdm application 7, prerequisites release note solution, 1  bp mdm technology 7, 3 bp mdm technology 7, mdm patching process, 1portal content, mdm component, 3 mdm ep 7
Related Notes : 
       
| 1587033 | Slave connot connect to master | 
| 1586374 | Internal tuple fields are not cleared in MDM WD Item Details | 
| 1585916 | Executing 'Merge Into' on a Hierarchy causes a server crash | 
| 1585556 | Import Manager erroneously creates new qualified links | 
| 1584626 | MDM Server (MDS) crashes on HP-UX operating system | 
| 1584607 | Add new attrib value in iView and DataManager simultaneously | 
| 1584600 | MDIS corrupting xml files when aggregation count >1 |