Solution : https://service.sap.com/sap/support/notes/975068 (SAP Service marketplace login required)
Key words :
a_fs structure manually, transaction fagll03 works, prerequisites partner fields, faglflexa_fs structure previously, partner fields, faglflexa_fs structure, transaction faglb03, transaction fagl_gins, balance display, make selections
Related Notes :
| 1007825 | FAGLL03: Field 'Cost element' not provided for accrual |
| 1005733 | FAGLL03: 'Cost element' field missing for custom selection |