Solution : https://service.sap.com/sap/support/notes/648267 (SAP Service marketplace login required)
Key words :
insert t_postabsub index sy-tabix, t_postabsub-tabix = sy-tabix, substitutable fields oi processingpackage, customer-specific function module, customer-specific fields, call transaction se11, ci_rfopst_postabsub-zztest = 'test', display customer fields, user-defined fields, business transaction event
Related Notes :
| 1060378 | Clearing rules for customer-specific fields |
| 647773 | Open item processing: Displaying customer-specific fields |
| 184510 | Documentation or scope of service for BTE > Release 4.0 |