Solution : https://service.sap.com/sap/support/notes/1267425 (SAP Service marketplace login required)
Key words : 
peruvian company code, bkpf-kursf reason, tax tab page, foreign currency rate, foreign currency, manual tax, transaction currency, transaction miro, entered manually, program termination
Related Notes : 
       
| 1093088 | F5060 Direct tax balance on Tax screen in Argentina/Peru |