Solution : https://service.sap.com/sap/support/notes/51861 (SAP Service marketplace login required)
Key words : 
directory /usr/sap/put/bin enter, directory /usr/sap/put/data, preceding maintenance level remained unchanged, reloading correctly saved customer documentation, \usr\sap\put\data, /usr/sap/put/data, additional key words upgrade, docu creation transaction se61, created customer-specific documentation, solution supported automatically due
Related Notes : 
       
| 43288 | Additional Info: Upgrading to 3.0E | 
| 37387 | Additional Info: Upgrading to 3.0D | 
| 33004 | Additional Info: Upgrading to 3.0C |