Solution : https://service.sap.com/sap/support/notes/119350 (SAP Service marketplace login required)
Key words : 
catt data/application flow, additional key words scatsm35ke21fiincon, batch input session, document number gaps, kernel error exists, type 'document, kernel patch, local update, success messages, action log
Related Notes : 
       
| 175047 | Causes for FI document number gaps (RF_BELEG) | 
| 19466 | Downloading SAP kernel patches |