Solution : https://service.sap.com/sap/support/notes/566217 (SAP Service marketplace login required)
Key words : 
tree structures 'sap easy access menu', ea-trv extension switch manually, required ea-trv activation switch, support package versions affected, error summary log xpras, /3 enterprise extension set' activity, ea-trv entry, 'sap reference img', sap reference img, tree structures
Related Notes : 
       
| 575938 | Runtime error for release of a template | 
| 549660 | Upgrade 4.70: BC Set EA-TRV-XXX activated with error | 
| 513536 | Add. information on upgrade to SAP R/3 Enterprise Core 4.70 | 
| 122597 | Ignoring errors in the phase XPRAS_... |