Solution : https://service.sap.com/sap/support/notes/147318 (SAP Service marketplace login required)
Key words : 
additional key words ewu, reload data backup, apply hot package 16, long runtime occurs, long runtime, hot packages, support package, unjustifiable runtime, change programs, tables vbak
Related Notes : 
       
| 144866 | |
| 121626 | Euro LC changeover:important Support Packages info. |