Solution : https://service.sap.com/sap/support/notes/204597 (SAP Service marketplace login required)
Key words :
additional key words nfal-child, tools -> abap workbench -> dictionary, 'output characteristics convers, -digit character field, numeric character field, comparison operations occur, alpha conversion exit, change domain ish_child, nfal-child, comparison operations
Related Notes :
| 209905 | IS-H SG: Estimated invoice - Number of children |
| 101101 | IS-H:Upd.collective note, important errors in 4.01A |