Solution : https://service.sap.com/sap/support/notes/414287 (SAP Service marketplace login required)
Key words : 
efgh additional key words batch input, function key shift-f11, 1234&&5678             abcd&&efgh   multiple selection, function code impt, multiple selection screen, functionality solution import, 1234              5678              abcd   multiple selection, source code correction, shift + f11, multiple selection
Related Notes : 
       
| 557702 | FAQ for mass maintenance |