Solution : https://service.sap.com/sap/support/notes/431009 (SAP Service marketplace login required)
Key words : 
prerequisites solution replace workspace 'navigation_view', additional key words navigation_view, automatically created workspaces, component 'navigation area', termination message occurs, workspace 'navigation_view', workspace 'locator', maintenance, otherwhise
Related Notes : 
       
| 396690 | SAP CRM 3.0: Information on Upgrade |